12 Different Types of Locks and How to Choose the Best

Locks keep our homes, businesses, and belongings safe from unwanted visitors. A locksmith installs these security devices, makes sure they work properly, and fixes them when they break. Good locksmiths know exactly how to fit the right lock for your needs and can get you out of a jam when you're locked out.

When you're looking at locks, you'll notice they come in all sorts of shapes and sizes. Some are simple, others are high-tech. We group locks based on how they work, how they're installed, and how much security they provide. Picking the right lock means thinking about what you're protecting, where the lock will go, how often you'll use it, and what you can afford. It's all about finding that sweet spot between keeping things secure and making your life convenient.

Let's look at the 12 most common locks you'll find in Australian homes and businesses:

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1. Padlocks

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Padlocks are the portable locks you can carry around and use whenever you need them. They have that distinctive U-shaped piece of metal (the shackle) that clicks into place when you lock it.

You'll spot padlocks on sheds, gates, storage units, gym lockers, and even luggage. They're perfect when you need security in different places or just temporarily.

Some padlocks open with a key, while others use a combination of numbers. The newest ones even scan your fingerprint to let you in!

Pros:

• You can take them anywhere
• They come in all security levels from basic to super secure
• No need for complicated installation
• You can find cheap ones or invest in better models

Cons:

• Someone with bolt cutters might be able to cut through cheaper models
• The small ones aren't very secure
• It's easy to lose the key or forget the combination

Better padlocks have features like hardened steel that resists cutting, shields that protect against drilling, and special keys that are harder to copy or pick.

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2. Deadbolts

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Deadbolts are those solid metal locks that slide directly into your door frame. Unlike spring locks, they don't bounce back - they stay firmly in place until you turn the key or knob.

You'll find deadbolts on front doors, back doors, and any exterior door where security matters. They work best on solid doors where you want serious protection without fancy electronics.

You can get a single-cylinder deadbolt (key outside, thumb-turn inside), a double-cylinder (needs a key from both sides), or a jimmy-proof deadbolt that mounts on the surface for extra protection.

Pros:

• They're really tough to force open
• The mechanism is straightforward and reliable
• They last for years and years
• You can choose different security levels

Cons:

• If they're not installed properly, they won't be as secure
• Double-cylinder models could slow you down during a fire
• Cheaper models can still be picked by someone who knows how

Good deadbolts have hardened steel bolts, plates that protect against drilling, reinforced areas where the bolt meets the frame, and cylinders that resist picking. They're must-haves for any external door.

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3. Smart and Electronic Locks

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Smart and electronic locks ditch the traditional key for digital technology. Instead of metal keys, these modern marvels use codes, cards, fingerprints, or your smartphone to let you in.

You'll spot these high-tech locks on front doors of tech-savvy homes, throughout office buildings, on Airbnb rentals, and anywhere people want to control access without physical keys. They're becoming super popular with homeowners who want to monitor their doors from anywhere.

These locks really shine when you need flexibility. Imagine giving your dog walker a code that only works between 2-4pm on weekdays, or checking your phone to see if your teenager actually came home by curfew. They're perfect if you're always losing keys or want to unlock the door for your in-laws while you're still at work.

The smart lock family includes keypads where you punch in a code, fingerprint scanners that read your unique print, Bluetooth locks that connect to your phone when you're nearby, Wi-Fi locks you can control from anywhere, and hybrid locks that offer electronic features with traditional key backup just in case.

Pros:

• Kiss your keychain goodbye
• Let people in (or keep them out) with a few taps on your phone
• See exactly who came in and when they left
• Some lock up automatically when you walk away
• Unlock the door while you're still in the car with groceries
• Give the plumber a one-day code without taking time off work

Cons:

• Dead batteries mean you might get locked out
• They cost more than old-school locks
• Tech-savvy burglars might try hacking some models
• Setting them up can be a headache if you're not tech-friendly
• Sometimes the app or lock has glitches
• You'll need to replace batteries every few months

The best smart locks protect your digital keys with serious encryption (the same stuff banks use), lock automatically after you leave, send alerts if someone's messing with your door, keep a detailed visitor log, and work with the rest of your home security system. Many require both your phone and a code for extra security, and some even include old-fashioned protections against picking and drilling.

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4. Knob Locks

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Knob locks are those everyday locks where the locking mechanism lives right inside the doorknob. Usually, the keyhole is on the outside knob, with a push button or turn button on the inside.

These familiar locks are everywhere inside our homes – on bedroom doors, bathroom doors, and closets. Sometimes they're also used on back doors or side entrances, though usually with a deadbolt for extra security.

Knob locks are perfect for rooms where you just want some privacy rather than Fort Knox security. They're ideal for bathrooms (when someone's taking a shower), bedrooms (for changing clothes), or a home office (when you're on an important call).

You can find privacy knobs that lock from the inside only (perfect for bathrooms), entry knobs that lock from both sides (good for bedrooms), passage knobs that don't lock at all (for closets and hallways), and dummy knobs that are just for show and don't actually turn.

Pros:

• Even DIY beginners can install them
• They won't break the bank
• Come in endless styles to match your home's look
• Everyone from kids to grandparents knows how to use them
• Provide that "please don't come in" level of privacy
• No need to explain how they work to houseguests

Cons:

• They're not tough enough for front doors on their own
• Someone strong could break the knob off completely
• Many can be opened with a screwdriver or credit card
• Difficult for people with arthritis or hand strength issues
• Won't stop anyone who's truly determined to get in
• All the lock parts are exposed right there in the knob

Knob locks aren't security superstars, which is why you shouldn't rely on them alone for outside doors. Some better-quality knob locks might have pins that resist picking and stronger materials, but they're mainly designed for convenience and privacy, not serious security. For inside your home, they're perfectly fine for keeping family members from barging in when you want some alone time.

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5. Lever Handle Locks

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Lever handle locks use a horizontal lever instead of a round knob to operate the door. You push down on the lever, and it retracts the latch, letting you open the door with less twisting motion than a doorknob requires.

You'll see lever locks all over the place in commercial buildings, schools, hospitals, and increasingly in homes. They're the go-to choice for offices, public restrooms, and any door that needs to meet accessibility standards. Many modern homes are also installing them for their sleek look and ease of use.

Lever locks really shine in places where accessibility matters. They're perfect for anyone with limited hand strength, arthritis, or mobility challenges since you can easily open them with an elbow or forearm when your hands are full. They're also ideal for commercial spaces that need to comply with disability access laws.

The lever lock family includes passage levers (no locking, just a handle), privacy levers (lock from inside for bathrooms and bedrooms), entry levers (lock from both sides for offices and exterior doors), and storeroom levers (always locked from outside, perfect for supply closets and restricted areas).

Pros:

• So much easier to use than knobs - just push down
• Great for people of all ages and abilities
• Look modern and professional
• Come in designs that match any decor style
• Meet accessibility requirements for public buildings
• Can be opened even when your hands are full

Cons:

• The outside lever can sometimes be forced down with pressure
• Usually cost a bit more than knob locks
• The lever can catch on clothing or bags when walking by
• Not all models are equally secure
• Some cheaper versions can feel loose after repeated use
• More complex internal mechanisms than knob locks

Security features vary widely depending on quality and grade. Commercial-grade lever locks offer hardened internal components that resist tampering, anti-pick cylinders that make lockpicking difficult, reinforced levers that won't break under pressure, and some even include anti-microbial coatings for healthcare settings. While the basic design makes them slightly more vulnerable to force than knobs, high-quality lever locks can be very secure when properly installed.

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6. Cam Locks

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Cam locks are small, simple locking devices with a key-operated cylinder attached to a cam - that's the little metal arm that rotates when you turn the key. When you turn the key, the cam moves from behind a strike plate or into a slot, securing the door or drawer.

These straightforward locks are everywhere in our daily lives. You'll find them securing mailboxes, cabinets, lockers, display cases, file cabinets, toolboxes, and small enclosures. They're those little locks on office furniture, medicine cabinets, and the drawers in hotels.

Cam locks work best when you need basic security for items that aren't extremely valuable. They're perfect for keeping office supplies organised, preventing casual snooping in file cabinets, securing employee lockers, or keeping kids out of medicine cabinets. Anywhere you need a simple lock that doesn't require complex installation is a good candidate.

These versatile locks come in several types: straight cams that rotate directly behind a frame, offset cams that reach around corners for unique installations, flat cams for sliding doors, and radial cams that provide multiple locking points. They also come in different lengths to fit various door thicknesses.

Pros:

• Super easy to install - usually just a hole and a nut
• Budget-friendly compared to other lock types
• Compact size works in tight spaces
• Available in countless sizes and cam shapes
• Keys are typically simple and affordable to duplicate
• No complicated mechanisms to fail

Cons:

• Provide only basic security - not for high-value items
• Many can be picked with minimal skill
• Limited key variations means others might have similar keys
• The cam can bend or break if forced
• Not suitable for exterior doors or high-security needs
• Repeated use can wear down the mechanism

Most cam locks provide simple security features focused on convenience rather than serious protection. Basic models deter opportunistic opening but aren't designed to withstand determined efforts. Higher-end cam locks might include disc tumblers instead of pin tumblers for better pick resistance, hardened steel cams that resist bending, and restricted keyways that make unauthorised key duplication more difficult. Some even offer master key capabilities for businesses that need supervisory access to multiple locks.

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7. Mortise Locks

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Mortise locks are the heavyweight champions of the lock world. Instead of sitting on the surface, these locks actually live inside your door in a pocket (that's the "mortise") carved into the edge. Think of them as built-in rather than bolted-on.

You'll spot these substantial locks on gorgeous front doors of fancy homes, throughout nice hotels, and on historic buildings with original woodwork. Banks, high-end restaurants, and executive suites often choose them not just for security but for that solid "chunk" sound they make when closing.

These locks really come into their own on thick, solid doors where you want serious security without sacrificing style. If you've invested in a beautiful hardwood front door, a mortise lock completes the look while protecting your home. They're also perfect for busy doors that get opened hundreds of times daily, since they're built to handle the wear and tear.

Mortise locks come in all sorts of configurations: entrance locks that let you use a key outside and thumb-turn inside, classroom locks that can't be locked from inside (preventing someone from locking themselves in), storeroom locks that are always locked from the outside, and plenty of other specialised types for specific needs.

Pros:

• Built tough as nails with heavy-duty guts
• Give you a deadbolt and latch in one package
• Look impressive and substantial on quality doors
• Can literally last for generations with care
• Stand up to forcing, kicking, and other break-in attempts
• Come in gorgeous designs from antique to ultra-modern

Cons:

• Installing one is definitely not a DIY weekend project
• Need a big pocket cut into your door
• Cost quite a bit more than regular locks
• Fixing them isn't cheap if something breaks
• Their weight might mean you need stronger hinges
• Older models might need special ordering for parts

Quality mortise locks pack in serious security features like deadbolts that extend a full inch into the door frame (twice what standard locks offer), components made of hardened steel that resists sawing, multiple parts that lock simultaneously, beefy strike plates that spread impact forces across the frame, and cylinders designed to defeat picking and drilling attempts. Since the whole mechanism tucks inside the door, there's very little exposed to attack.

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8. Euro Profile Cylinders

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Euro profile cylinders are those keyhole-shaped lock cores that snap into modern door locks. They're the standardised "brain" of the lock – the part with all the pins that your key pushes into place.

These sleek cylinders have become the standard in new Australian homes, throughout Europe, and in modern buildings worldwide. You'll see them in front doors, back doors, apartment entries, patio doors, and office suites. If you've moved into a place built or renovated in the last couple of decades, you probably have them.

Euro cylinders really shine when you want flexibility. Moving into a new home? Swap the cylinders rather than changing whole locks. Lost your keys? Replace just the cylinder. Want all your doors to work with the same key? Euro cylinders make it easy. They're perfect for rental properties, homes with multiple exterior doors, and anyone who appreciates their simple, modern look.

The family includes single cylinders with a key hole on one side and thumb-turn on the other (common on homes), double cylinders needing keys on both sides (good for doors with glass panels), half cylinders for situations needing key access from just one side, and cylinders where different keys work each side (for internal access control).

Pros:

• Super easy to swap out when needed
• Upgrade your security without replacing entire locks
• Clean, contemporary look
• Widely available when you need replacements
• Come in basic models for lower budgets or high-security versions
• Locksmith can change them quickly if keys go missing

Cons:

• Basic models can be vulnerable to "snapping" attacks
• Cheaper ones might be opened with bumping techniques
• Have to be installed precisely to work properly
• Double-cylinder versions might slow you down in emergencies
• Need to measure exactly to get the right size
• The good, secure ones cost quite a bit more

The security features vary dramatically depending on what you're willing to spend. Basic euro cylinders offer standard protection, while better ones include snap-resistant designs that break at a specific point while keeping the door locked, hardened steel inserts that defeat drilling attempts, special pins that resist bumping attacks, mechanisms that frustrate picking attempts, and restricted keyways that make it harder for anyone to duplicate your keys without authorisation. Top-of-the-line models can have multiple rows of pins, creating millions of possible combinations.

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9. Rim Locks

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Rim locks are the quick-fix security heroes that mount right on the surface of your door. Unlike locks that need to be embedded inside the door, these attach directly to the face of it – the lock body sits on the inside surface, with just a cylinder poking through to the outside.

You'll spot rim locks all over older apartment buildings, adding extra security to front and back doors, and securing gates and garden sheds. City dwellers love them as secondary locks, historic home owners appreciate their vintage charm, and renters use them because they're easy to install without damaging doors.

These locks really shine when you need to beef up security without major carpentry work. Just moved into a place with flimsy locks? A rim lock adds protection without complicated installation. Renting and can't modify the door? Rim locks can be removed when you leave. Have a hollow door that can't fit a regular deadbolt? Rim locks to the rescue.

The rim lock gang includes simple rim deadbolts that slide a solid bolt into a strike plate, rim latches with a sloped bolt operated by a knob, jimmy-proof deadbolts with interlocking parts that resist prying, and night latches (sometimes called "Yale locks") that click locked automatically when you pull the door shut.

Pros:

• Slap one on with basic tools in under 30 minutes
• Add security without cutting up your door
• Work alongside your existing locks for extra protection
• Take them with you when you move if needed
• Cost less than fancier embedded locks
• Come in charming antique designs or sleek modern styles

Cons:

• They're not exactly subtle – everyone can see them
• The cylinder pokes through the door creating a potential weak spot
• Some models stick out quite a bit from the door surface
• Might not be as tough as locks built into the door
• Mounting screws could potentially be attacked
• Only as strong as the door and frame they're attached to

Better rim locks pack in features like hardened steel bolts that resist cutting attempts, reinforced cylinders that stand up to drilling, mechanisms designed to frustrate lockpicking, and clever jimmy-proof designs with parts that interlock when locked – meaning even if an attacker damages the door frame, the door stays shut. Night latches often have deadlocking features that prevent someone from slipping a card between the door and frame to push the latch back.

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10. Interchangeable Core (IC) Cylinders

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Interchangeable core cylinders are the quick-change artists of the lock world. The special design allows the core (the part with all the pins that your key pushes into place) to be popped out and swapped in seconds using a special "control key" – no need to take the whole lock apart.

These clever systems dominate commercial settings like office towers, university campuses, hospital complexes, and apartment buildings. Any place with lots of doors and frequent key changes relies on them to keep security management simple.

IC cylinders are absolute lifesavers when keys go missing or employees leave. Instead of calling a locksmith to spend hours removing and rekeying locks, a facility manager can literally change a lock in 15 seconds with a control key and new core. They're perfect for businesses that can't afford downtime, apartment complexes with regular tenant changes, and any facility with dozens or hundreds of locks to manage.

The family includes Small Format Interchangeable Cores (SFIC) which are the most common and work with locks from many manufacturers, and Large Format Interchangeable Cores (LFIC) which are often specific to certain brands. Both can create complex master key systems where some people have access to just one door while managers can open everything.

Pros:

• Change a lock in seconds flat without tools
• Keep all the door hardware in place when rekeying
• Create building-wide systems where keys work exactly as intended
• Build sophisticated access levels from basic to master keys
• Get back to business immediately after security breaches
• Instantly revoke access when keys disappear

Cons:

• Cost more upfront than standard lock systems
• Need special control keys that must be guarded carefully
• Require more planning and management
• Usually need a locksmith to set up initially
• Replacement cores cost more than standard cylinders
• Rarely seen in homes – mostly a commercial solution

Quality IC systems come loaded with security features like pick-resistant pins arranged to defeat manipulation attempts, keyways cut in patterns that limit who can make copies, hardened steel components that stand up to drilling, additional sidebar mechanisms that add another layer of security, and controlled key systems that track and restrict duplication. The most advanced systems even incorporate electronic components that record who used which door and when – perfect for sensitive areas where you need to know exactly who came and went.

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11. Key In Knob (KIK) Cylinders

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Key In Knob cylinders are those little lock cores that live inside your doorknobs and lever handles. Think of them as the engine of your lock – the part where all the magic happens when you stick your key in.

Though you never see them unless you're taking a lock apart, these standardised cylinders are working hard inside knobs and levers all over Australia. That small metal package filled with springs and pins is what decides whether your key gets to turn or not.

These cylinders really save the day when you want to make changes without replacing all your hardware. Just moved in and don't know who else might have keys? Swap the cylinders instead of buying all new doorknobs. Want your front door, back door, and garage door to all work with the same key? Changing the cylinders makes it happen without replacing everything. Lost your keys? A new cylinder is much cheaper than all new locks.

While all KIK cylinders are designed to fit standard doorknobs and levers, they range from basic models that offer minimal security to sophisticated versions that can resist picking, bumping, and drilling.

Pros:

• Save a bundle by just replacing the cylinder, not the whole knob
• Update your security without changing how your doors look
• Set up your house so one key opens all the doors
• Available everywhere from hardware stores to locksmith shops
• Upgrade from basic security to something better
• Any locksmith can swap them out in minutes

Cons:

• Have to take apart the knob or lever to get at them
• Not as quick-change as some fancier systems
• Only as good as the doorknob they're sitting in
• Huge difference between cheap and quality ones
• Budget versions can be picked pretty easily
• Some won't work with high-security key systems

The security you get completely depends on what you're willing to spend. Basic cylinders have standard pins that determined thieves can pick, while better ones have specially shaped pins that resist lockpicking tools, clever designs that trick anyone trying to pick them, extra security elements beyond just pins, and special keyways that make it harder for anyone to copy your keys without permission. Just remember – even the best cylinder can't make up for a flimsy doorknob or weak door.

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12. Jimmy Proof Deadbolts

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Jimmy proof deadbolts are the bouncers of the lock world – specifically built to stop the most common break-in technique where burglars try to pry doors away from their frames. Unlike regular deadbolts that slide straight into the frame, these smart locks have parts that interlock, keeping your door secure even if someone tries to force it open.

You'll spot these distinctive surface-mounted locks all over city apartments, especially in older buildings where the doors might not be perfect. They're also popular as extra security on homes, particularly for back doors or side entrances that might be more vulnerable.

These specialised locks really earn their keep when you're worried about someone trying to force your door open. Living in an apartment with an older door? A jimmy proof deadbolt adds serious protection. Renting and can't cut into the door for a regular deadbolt? These mount on the surface with just a few screws. Want a second lock beyond your regular one? These provide that extra layer of security that helps you sleep better.

While they all work using the same clever interlocking idea, you'll find some that mount up and down (vertical) and others that go side to side (horizontal), depending on your door setup. Some need a key from both sides (great for doors with glass), while others have a convenient thumb turn inside for quick exits.

Pros:

• Built specifically to stop burglars from prying your door open
• Install in about half an hour with just a screwdriver
• Work even if your door and frame aren't perfectly lined up
• Send a clear "don't even try it" message to potential intruders
• Add serious security without major door surgery
• Perfect for thinner doors that can't fit standard deadbolts

Cons:

• Bulkier and more noticeable than hidden deadbolts
• Not winning any beauty contests with their industrial look
• The mounting screws could potentially be targeted
• Don't come in as many designer styles as other locks
• Some types need a key to get out (could be an issue in emergencies)
• Might not fit right with unusual door setups

Good quality jimmy proof deadbolts have smart security features like parts that actually grip tighter when someone applies force, hardened steel components that resist cutting, clever designs that wedge more firmly as pressure increases, sturdy strike plates that spread force across the frame, and pick-resistant cylinders to prevent lockpicking. Their brilliant design means that unlike regular locks, they actually get more secure under pressure – the harder someone tries to break in, the more firmly they lock up.

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What is a lock?

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A lock is a device that keeps things shut until the right person comes along with the right key or code. Think of it as a gatekeeper that stands between your stuff and anyone who might want to get at it.

Locks have been around for thousands of years, evolving from simple wooden pins in ancient Egypt to the digital smart locks we have today. Whether it's keeping your diary private, your front door secure, or a bank vault sealed, locks all share the same basic job: stop unwanted access while letting the right people through.

Some locks use traditional keys that push pins into just the right position, others need you to punch in a code, and the newest ones might scan your fingerprint or connect to your phone. Some are simple and affordable, while others are sophisticated enough to resist even determined attacks.

When you get down to it, locks are all about peace of mind. While no lock is absolutely unbeatable (given enough time and the right tools, most can be defeated), a good lock makes unauthorised access difficult enough that most potential intruders will move on to easier targets. From the simple lock on your bathroom door to the heavy-duty deadbolt protecting your front entrance, these devices form the first line of defense in keeping our spaces and belongings secure.

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What is the classification of door locks?

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When we talk about classifying door locks, we're basically creating a family tree for all the different types so we can understand how they relate to each other. This organization helps us figure out which lock is right for which situation, compare different options, and speak the same language when discussing security needs.

Door locks are the security devices we install on doors to control who gets in and who stays out. They range from the simple twist locks on bathroom doors to sophisticated electronic systems on bank vaults, but they all serve the fundamental purpose of managing access to spaces.

Locks typically fall into these main categories:

Based on how they're installed:

• Surface-mounted locks that attach right onto the door (like rim locks)
• Mortise locks that fit into a pocket cut into the edge of the door
• Cylindrical locks that go through holes drilled in the door
• Integrated locks built right into the door when it's manufactured

Based on how they work:

• Old-school mechanical locks that need physical keys
• Electronic locks with keypads or card readers
• Smart locks you control with your phone
• Biometric locks that scan your fingerprint or face

Based on what they're for:

• Entry locks for front doors and main access points
• Privacy locks for bathrooms and bedrooms
• Passage locks for doors that just need to latch closed
• Storeroom locks that are always locked from the outside
• Classroom locks that can't be locked from inside
• Office locks that can be locked from either side

Based on security level:

• Basic locks that offer simple privacy
• Standard locks for typical home security
• High-security locks with pick resistance and restricted keys
• Maximum security locks for protecting valuable or sensitive areas

This classification helps match the right lock to the right situation. You don't need a high-security deadbolt on your bathroom door, and you wouldn't want just a simple knob lock on your front entrance. Understanding these categories helps you make smart decisions about securing what matters to you – whether it's keeping toddlers out of the cleaning supplies cabinet or protecting your home from potential break-ins.

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Locks can be classified according to types of lock

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When we talk about "types" of locks, we're looking at how they're built, how they work, and what makes them different from each other. Understanding these differences helps you pick the right lock for your needs, whether you're securing your front door, a storage unit, or a filing cabinet.

• Mechanical Locks: The old-school locks that don't need batteries or electricity. These traditional locks use physical parts that move when you insert and turn a key. Think of the classic pin tumbler locks in your front door, the wafer locks in your desk drawer, or the lever locks in historic buildings. They're reliable and don't fail when the power goes out.
• Electronic Locks: The modern locks that use electric signals instead of physical keys. Instead of carrying a metal key, you might punch in a code, swipe a card, or tap a fob to get in. Hotels love these because they can easily reprogram them between guests, and businesses use them to track who enters which rooms and when.
• Smart Locks: The tech-forward locks that connect to your phone and home network. These clever devices let you lock or unlock doors from anywhere, create temporary access codes for visitors, check lock status remotely, and often work with other smart home gadgets like doorbell cameras. Some even unlock automatically as you approach with your phone.
• Biometric Locks: The high-tech locks that recognize physical traits that make you unique. These futuristic options might scan your fingerprint, look at your eyes, recognize your face, or even analyze the pattern of veins in your hand. They're becoming more popular because you can't forget or lose your fingerprint like you can a key or code.
• Padlocks: The portable locks you can take with you. With their distinctive U-shaped shackle that clicks into the body, these versatile locks aren't attached to anything permanently. They secure gym lockers, storage units, gates, sheds, and anywhere else you need removable security.
• Deadbolts: The no-nonsense locks that slide a solid metal bolt straight into your door frame. Unlike spring locks that can be pushed back, deadbolts stay firmly in place until you turn the key or knob. They're the security workhorses on most exterior doors because they resist forcing and kicking.
• Mortise Locks: The heavy-duty locks that fit into a pocket cut into your door's edge. These substantial locks usually combine a deadbolt and latch in one unit and are known for their impressive strength. You'll spot them in older homes, high-end properties, and commercial buildings where security and durability matter.
• Cylindrical Locks: The common locks installed through a hole in the door face. The locking mechanism sits inside the door itself rather than in the knob. These practical locks strike a good balance between security, cost, and ease of installation, which is why they're so widespread in homes and businesses.
• Rim Locks: The surface-mounted locks that attach to the face of your door. With the lock body on the inside and just a cylinder passing through to the outside, they add security without major door modifications. Many apartment dwellers install these as additional protection because they don't require altering the door.
• Cam Locks: The simple locks with a flat metal arm that rotates. When you turn the key, the cam rotates to either block or allow opening. These straightforward locks secure filing cabinets, mailboxes, display cases, and other enclosures where you need basic security without complexity.

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Locks can be classified according to purpose of lock

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When we classify locks by "purpose," we're focusing on what job the lock needs to do. Different situations call for different lock functions - from keeping high-value items secure to simply preventing awkward bathroom interruptions. Understanding these purposes helps match the right lock to each door in your home or business.

• Entry Locks: The everyday locks that find the sweet spot between security and convenience. These familiar locks on front doors and main entrances let you use a key from outside and a simple thumb turn from inside. They're designed to be secure enough to protect your home while being easy to use dozens of times daily.
• Security Locks: The serious locks when protection is the top priority. These tough locks offer advanced features like pick resistance, drill protection, and restricted keys that can't be copied at the hardware store. Banks, safes, and areas with valuable or sensitive contents depend on these when security can't be compromised.
• Privacy Locks: The simple locks that just prevent embarrassing moments. These are the push-button or turn-button locks on bathroom and bedroom doors. They're not meant to keep out determined intruders (most can be opened from outside with a paperclip), but they prevent accidental walk-ins when you want some privacy.
• Passage Locks: The "locks" that don't actually lock at all. These latch mechanisms for closets, hallways, and connecting doors don't have any locking function – they just keep doors from swinging open while allowing free access for everyone. They're all about convenience, not security.
• Storeroom Locks: The "always locked from outside" locks for restricted areas. Perfect for janitor closets, supply rooms, and storage areas, these locks always require a key for entry but allow free exit from inside. They ensure only authorised people get in while making sure nobody gets trapped inside.
• Classroom Locks: The school-safety locks that can only be secured from the hallway side. Teachers can lock them with a key from outside, but there's no way to lock them from inside the classroom. This prevents students from locking teachers out while allowing quick security during emergencies.
• Office Locks: The flexible locks that work from both sides. These adaptable locks let office workers secure their door from inside while working (using a button) or lock up when leaving (with a key). They're perfect for spaces that need both day-to-day privacy and after-hours security.
• Emergency Exit Locks: The safety-first locks that never trap people inside. These include panic bars and crash bars on exit doors that open with a simple push, regardless of whether they're locked from outside. They keep unauthorised people from entering while ensuring quick evacuation during emergencies.
• Decorative Locks: The beautiful locks that please the eye while doing their job. While still functional, these stylish locks are chosen partly for their looks. Historic homes, luxury properties, and design-conscious spaces use these to enhance their aesthetic appeal while still providing security.
• Child Safety Locks: The parent-friendly locks that outsmart curious little ones. These specialised locks for cabinets, drawers, appliances, and doors use mechanisms too complicated for small children to figure out while remaining simple for adults. They keep kids away from dangerous items or areas without frustrating the grown-ups.

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What are the most popular Entrance door locks?

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Deadbolts paired with cylindrical locks win the popularity contest for front doors because they give you solid security without breaking the bank. This one-two punch creates a double barrier that makes forced entries much harder to pull off.

What makes deadbolts so perfect for your front door? That chunky one-inch metal bolt slides deep into your door frame, creating a secure barrier that can't be jimmied with a credit card or plastic like spring locks can. They're surprisingly simple to use despite their strength, and they come in different styles to match your needs – from traditional key-operated versions to modern smart locks you can control with your phone. Most homeowners choose the single-cylinder version (key outside, easy thumb turn inside) for the perfect balance of security and quick exits during emergencies.

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What are the most popular Room door locks?

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Lever handle privacy locks take the crown for bedroom doors because they hit that sweet spot between everyday convenience and "please knock first" privacy without turning bedrooms into high-security zones.

Why are lever locks so perfect for bedrooms? First, they're super easy to use – just push down instead of twisting, which is great when your hands are full of laundry or bedding. The built-in privacy function lets you lock the door with a simple push-button or turn when you're changing clothes or want some alone time, but they can be quickly unlocked from outside with a small tool if someone accidentally locks themselves in. The lever design works better than knobs for everyone – from kids to grandparents with arthritis – making them the practical choice for any bedroom.

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What are the most popular Bathroom door locks?

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Privacy lever or knob locks dominate in bathrooms because they give you that essential "occupied" signal without creating panic situations if someone gets locked inside.

These locks are bathroom champions because they do exactly what's needed in this space: prevent awkward walk-ins while someone's using the facilities. The simple push-button or thumb-turn on the inside is easy to operate even with wet hands, while the tiny emergency hole on the outside means nobody stays locked in the bathroom for long. They hold up well in steamy, humid bathroom environments, and they focus on preventing embarrassment rather than stopping determined intruders – which is precisely what most bathrooms need. They're also budget-friendly and come in finishes that coordinate with your bathroom fixtures.

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What are the most popular Kitchen and passage locks?

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Passage lever handles (the non-locking kind) are the go-to choice for kitchens and hallways because they keep doors from swinging open while never restricting movement between spaces.

What makes these so ideal for busy areas like kitchens? They provide just enough functionality to keep doors neatly closed without ever getting in the way of the constant traffic flow. The lever design is a lifesaver when you're carrying groceries, plates of food, or kitchen gadgets – just bump it with your elbow or forearm to open. Since they never lock, you don't have to worry about family members or guests getting locked out of essential spaces. They're typically the most affordable option while still looking coordinated with the rest of your door hardware, making them the practical choice for spaces where security isn't needed but convenience is essential.

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How to choose the best lock for you

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Finding the right lock doesn't have to be complicated, but it does require some thought about your specific situation. Here's a straightforward guide to help you pick locks that actually meet your needs:

1. Think about what you're protecting - Your front door deserves more security muscle than your bathroom door. Consider what's at stake if someone got through that particular door.
2. Be realistic about your security needs - Do you live in a high-crime area or a quiet suburb? Are you protecting irreplaceable valuables or just wanting basic privacy? Your situation should determine your security level.
3. Consider who'll be using the door - Grandparents might struggle with complicated locks, and kids might forget codes. Choose locks that everyone who needs access can easily operate.
4. Set a reasonable budget - Good locks aren't cheap, and cheap locks aren't good. While you don't need to spend a fortune, remember that your lock is the first line of defense for everything inside.
5. Check your door itself - Is it thick enough for a deadbolt? Does it already have holes cut for specific lock types? Is it solid wood or hollow core? Your door type limits your lock options.
6. Think about convenience features - Would it be worth paying extra for keyless entry so you don't fumble for keys while holding groceries? Do you want to unlock your door remotely for visitors?
7. Consider your local weather - If you live near the ocean, standard locks might corrode quickly. Extreme temperatures can affect some electronic locks.
8. Think about upkeep - Are you willing to change batteries in a smart lock? Or would you prefer a mechanical lock that rarely needs maintenance?
9. Match your home's style - While security comes first, locks are also visible hardware that affect your home's appearance. Choose finishes and styles that complement your décor.
10. Plan for emergencies - Make sure any lock you choose allows for quick exit during emergencies like fires.
11. Check your insurance requirements - Some policies give discounts for certain lock types or might even require specific security grades.
12. Talk to a pro - When in doubt, a conversation with a locksmith can save you from expensive mistakes and security gaps.

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What are the security criteria to consider while choosing a lock?

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When shopping for locks, several key security factors determine whether you're getting solid protection or just the illusion of security. Understanding these criteria helps you make choices that actually keep you safe rather than just feeling safe.

The security rating tells you how much abuse a lock can take before failing. In Australia, look for locks rated under AS4145 standards. Think of it like a report card - Grade 1 locks are the top students (highest security), while Grade 4 locks are just passing (basic security). For your front door, aim for at least Grade 2, while Grade 1 makes sense if you have special security concerns or valuable items to protect.

The quality of the lock cylinder (where your key goes) matters enormously. Better cylinders have special pins that resist picking attempts, hardened steel to prevent drilling, and protection against "bumping" (a technique thieves use to quickly open locks). Some premium cylinders also have restricted keyways, meaning not just any hardware store can copy your keys - a huge plus for controlling who has access to your property.

Don't overlook the strike plate - that metal piece on your door frame where the bolt extends into. A flimsy strike plate undermines even the best deadbolt. Look for reinforced, larger strike plates with screws long enough to anchor into the solid wood framing behind your door trim, not just the thin decorative molding.

The bolt throw (how far your deadbolt extends into the door frame) should be at least 1 inch for exterior doors. Anything less makes it easier for someone to force the door open, even with a deadbolt installed.

Even the best lock offers little protection if installed poorly. This is where professional locksmiths really earn their keep. They ensure the lock is aligned correctly, installed securely, and configured for optimal protection. DIY installations often leave security gaps that professionals know to address.

A good locksmith does far more than just cut keys and install hardware. They're security consultants who can walk through your home, spot vulnerability points you might miss, recommend the right grade of lock for each door based on its purpose, suggest complementary security measures, and ensure everything works together as a system rather than as isolated pieces.

They can also create master key systems for homes with multiple entry points, advise on key control (who has copies and how to manage them), and provide maintenance to keep your locks working smoothly for years. Their experienced eyes can identify security weaknesses that most homeowners wouldn't notice until after a break-in.

Before buying locks, consider having a qualified locksmith assess your property. They can recommend specific models that match your security needs and budget, saving you from the common mistake of either underspending on key security points or overspending on features you don't actually need.

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Who can help you on choosing the best lock for you in Sydney?

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Professional locksmiths are hands-down your best guides when choosing locks in Sydney. They bring something important that you won't get from hardware store staff or YouTube videos: real-world security experience specific to your local area.

Sydney locksmiths have seen firsthand which locks hold up against actual break-in attempts in your neighbourhood. They know which brands resist the salt air corrosion near coastal suburbs like Bondi or Cronulla, and which locks stand up to the higher security demands of inner-city areas. This practical knowledge is invaluable when making security decisions.

A good Sydney locksmith doesn't just sell you hardware – they evaluate your specific situation. They'll look at your door type, frame condition, family needs, and security risks before recommending solutions. They notice details most homeowners miss, like whether your door hinges are exposed or if your frame needs reinforcement for a deadbolt to be effective.

Local locksmiths also understand Sydney's diverse housing stock – from heritage terrace houses in Paddington with their unique security challenges to modern apartment buildings in Parramatta with body corporate restrictions on lock modifications. They can navigate these specific situations with solutions you wouldn't find through general online research.

Perhaps most importantly, locksmiths provide objective advice across the entire market of lock products. Unlike retail stores with limited stock or smart home companies pushing only their own ecosystems, locksmiths can recommend the truly best option for your needs – whether that's a high-security Abloy deadbolt, a keyless entry system, or a master key solution for your growing family.

For genuinely helpful guidance on lock selection in Sydney, skip the hardware store and call a licensed, well-reviewed local locksmith. The consultation fee is minimal compared to the cost of buying the wrong lock or, worse, experiencing a break-in because of inadequate security.

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Why choose us for lock installation in Sydney?

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Lock installation might look simple in those five-minute DIY videos, but the reality is far more complex – especially with today's sophisticated security hardware. Each different lock type comes with its own installation challenges that can make the difference between actual security and just the appearance of it.

Deadbolts offer excellent protection, but only when installed with precision. That 1-inch bolt needs to slide smoothly into the strike plate without binding or excessive play. In Sydney's older homes, where doors and frames have often shifted over decades, our locksmiths know how to compensate for these irregularities to ensure proper alignment – something amateur installations frequently miss.

Smart locks bring a whole new level of complexity, requiring both mechanical know-how and electronic setup. Our technicians understand not just how to physically mount these devices but also how to configure them properly, connect them reliably to your home network, and set up backup entry methods for those inevitable technology hiccups.

Mortise locks, common in Sydney's character-filled older homes and upscale properties, require creating a precise pocket in the door edge – a specialised task that can ruin your door if done incorrectly. Our locksmiths have the right tools and experience to install these substantial locks without compromising door integrity.

Euro cylinder locks, increasingly popular in newer Sydney buildings, need exact measurements and proper security fittings to prevent cylinder snapping attacks. We know which protective rosettes and reinforcement plates work best with different door types – key details often overlooked in DIY installations.

High-security cylinders with sidebar mechanisms, restricted keyways, or magnetic coding require specialised programming equipment and dealer credentials that only professional locksmiths possess. Many of these advanced systems can't even be purchased without proper licensing.

Our Sydney-based locksmith team brings decades of combined experience with every type of lock – from traditional to cutting-edge. We'll make sure your chosen security solution is installed to exact specifications, properly aligned with your specific door and frame, and configured for optimal protection. We spot potential weaknesses that most homeowners would never notice, like inadequate strike plates or vulnerable frame materials.

By choosing professional installation, you're ensuring that the security features you've invested in actually work as intended. The most expensive lock in the world provides zero protection if it's installed incorrectly – and unfortunately, we regularly get called to fix DIY installations after break-ins have already occurred. Don't wait for a security failure to get your locks installed properly.

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