Types of locks fall into seven main categories: mortise, cylindrical, deadbolt, padlock, smart, rim, and magnetic locks. Each one suits a different door, budget, and security level. The right type of lock depends on where you’re installing it and how much protection you actually need.
Here’s what you need to know before you buy:
- How they work: Each lock type uses a different mechanism, from key-and-cylinder systems to keyless digital pads.
- When to use them: Main doors need higher-security locks. Bathroom and cabinet doors need lighter, moisture-resistant hardware instead.
- What they cost: Basic rim locks start under ₹500. Smart locks can cost ₹8,000 or more, depending on features.
This guide by Fab Bath Interiors breaks down all seven types of locks. It shows you which one fits which door, and it helps you avoid the hardware mistakes most homeowners make.
This guide draws on hands-on experience specifying door hardware for Indian homes and renovation projects. For example, many of the coating and backset recommendations below come directly from real installation call-backs on humid bathroom doors. As a result, the advice here reflects what actually holds up over years of daily use, not just a manufacturer’s spec sheet. However, always confirm current certification and warranty terms with your supplier, since standards and product lines change over time.
What Are the 7 Types of Locks? Quick Comparison
If you only have a minute, here’s the short version. The table below compares the seven types of locks by best use, average cost in India, and security level. Scan it, then jump straight to the section you need.
| Lock Type | Best For | Security Level | Approx. Cost (INR) |
| Mortise Lock | Main entry doors | High | ₹1,500–₹5,000 |
| Cylindrical Lock | Bedroom, bathroom doors | Medium | ₹600–₹2,000 |
| Deadbolt Lock | Front doors, extra security | Very High | ₹1,000–₹3,500 |
| Padlock | Cabinets, gates, storage | Medium | ₹200–₹1,500 |
| Smart Lock | Main doors, keyless entry | High | ₹5,000–₹15,000 |
| Rim Lock | Budget interior doors | Low–Medium | ₹300–₹900 |
| Magnetic Lock | Glass doors, cabinets | Low–Medium | ₹500–₹2,500 |
Mortise Locks: Best for Main Doors
A mortise lock sits inside a pocket cut into the edge of the door. It doesn’t sit on the surface like other hardware. This makes it one of the sturdiest types of locks for main entrances.
The lock body houses the latch and bolt together. As a result, it resists forced entry better than surface-mounted hardware. Most Indian homes use a mortise lock on the main door, since it combines a handle, latch, and key lock in one unit.
For example, a three-lever or five-lever mortise lock offers a strong balance of cost and security. It works well for most apartment entrances. However, mortise locks need a professional installer, because the door itself must be chiseled to fit the lock body.
If you’re renovating a main door, pair a mortise lock with a night latch. This gives you two independent locking points. It’s a simple way to raise your home’s security without a full hardware overhaul.
Cylindrical Locks: Best for Bathroom and Interior Doors
Cylindrical locks are the round-knob or lever-handle locks you see on bedroom and bathroom doors. The mechanism sits in a hole bored straight through the door face. This makes installation faster than a mortise lock.
Bathroom doors need privacy rather than heavy security. As a result, cylindrical locks with a simple privacy turn-button are the standard choice. Most interior design brands, including bath hardware suppliers, recommend cylindrical locks for wet areas.
Look for a rust-resistant finish, such as stainless steel or PVD coating. Bathroom doors face humidity every day, and an uncoated lock body can seize up within a year in a humid Indian bathroom.
A privacy cylindrical lock with an emergency-release slot is worth the small extra cost. It lets someone unlock the door from outside during a real emergency.
Deadbolt Locks: Best for Extra Security
A deadbolt lock throws a solid metal bolt directly into the door frame. It has no spring mechanism, unlike a standard cylindrical or rim lock. This is why deadbolts resist kicking and prying far better.
Single-cylinder deadbolts use a key outside and a thumb-turn inside. This setup works well for most Indian front doors. Double-cylinder deadbolts need a key on both sides, which adds security. However, you also need a key handy to exit during a fire, so check local safety codes first.
For example, pairing a deadbolt with an existing mortise lock creates two separate points of failure. An intruder has to defeat both, which is a standard recommendation from home-security consultants.
Padlocks: Best for Cabinets, Gates, and Storage
Padlocks are portable, detachable types of locks. They clip through a hasp or shackle point instead of mounting inside the door. This makes them the most flexible lock type, since you can move them between gates, cabinets, and storage units.
For instance, choose a hardened steel shackle for an outdoor gate. Cheaper brass shackles can be cut with basic tools in seconds. For bathroom or utility cabinets, a smaller brass padlock is usually enough, since the goal is child safety rather than theft prevention.
However, a padlock is only as strong as the hasp it’s attached to. A high-security padlock on a flimsy hasp still leaves a weak point.
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Smart Locks: Best for Keyless Convenience
Smart locks replace or supplement a physical key with a PIN pad, fingerprint scanner, or smartphone app. They’re increasingly common on main doors in Indian apartments and gated communities.
A smart lock logs every entry. As a result, it works well for households that want to track when family members, staff, or delivery visitors come and go. Most models also include a physical key override for power failures, so you’re never locked out during an outage.
For example, a fingerprint-and-PIN smart lock lets each family member use their own access method. This removes the daily hassle of remembering or sharing keys.
Smart locks cost more upfront. However, many homeowners find the convenience worth it once they stop worrying about lost keys.
Rim Locks: Best for Budget Interior Doors
A rim lock mounts on the surface of the door instead of inside it. This makes it the easiest and cheapest type of lock to install. As a result, rim locks are common on internal doors, store rooms, and older homes where the frame wasn’t prepped for a mortise lock.
Rim locks offer lower security than mortise or deadbolt locks. The lock body is visible, so it’s easier to tamper with. However, for low-risk interior doors, that trade-off is often reasonable.
If budget is your main concern, choose a rim lock with a night-latch function. It still gives you basic privacy and security for a fraction of the cost of other lock types.
Magnetic Locks: Best for Glass and Cabinet Doors
Magnetic locks use an electromagnet and armature plate instead of a mechanical bolt. There’s no moving latch to jam or wear out over time. This makes them a popular choice for frameless glass doors and bathroom cabinet fittings, where a standard lock body won’t fit.
Magnetic locks need continuous power to stay locked. Because of this, they’re typically paired with a backup battery or a manual bolt for power outages.
For bathroom vanity and cabinet applications, a small magnetic touch-latch is popular. It lets the door click shut and open with a light push, without any visible hardware.
How to Choose the Right Type of Lock for Your Home
According to the Bureau of Indian Standards, mortise locks sold in India should meet IS 16015:2022 specifications, which replaced the older IS 2209 standard. This means the lock has been tested for durability and load capacity, which gives you an objective way to compare products beyond the price tag.
Start by matching the lock type to the door’s purpose, not just its price. A main door needs a mortise lock or deadbolt for real security. A bathroom door needs a moisture-resistant cylindrical lock for privacy. A cabinet needs a padlock or magnetic latch for light-duty containment.
Next, check the finish. Bathroom and kitchen hardware should carry a corrosion-resistant coating, since humidity is the fastest way to ruin a lock’s internal mechanism. Fab Bath Interiors’ lock systems, for instance, are built with this kind of moisture exposure in mind.
Finally, budget for installation, not just the hardware. A mortise lock generally needs a carpenter or locksmith. Cylindrical, rim, and padlock options, on the other hand, are often simple enough for a confident DIY installer.
Common Mistakes to Avoid When Buying Door Locks
Even experienced homeowners after knowing types of locks and purchasing get this wrong. Here are the mistakes that come up most often, and how to avoid each one.
Buying on price alone. A cheap rim lock might save you ₹800 today, but it can fail within a year on a humid bathroom door. As a result, you end up paying for a replacement anyway, plus a new installation charge.
Ignoring the finish. Chrome and stainless steel both look similar in a showroom. However, only certain grades resist rust in a steam-heavy bathroom. Ask specifically about the coating before you buy, not just the base metal.
Skipping the door thickness check. Mortise locks and cylindrical locks come in different backset sizes. As a result, a lock that doesn’t match your door’s thickness either won’t fit or will sit loose over time. Always measure the door first.
Forgetting about emergency access. A double-cylinder deadbolt or a fully digital smart lock can trap you inside during a power cut or a fire. For this reason, always choose hardware with a manual override or a key on at least one side.
Mixing incompatible hardware. For instance, pairing a heavy-duty deadbolt with a flimsy door frame doesn’t add real security. The frame itself needs to be strong enough to hold the bolt, or the extra hardware is just for show.
Avoiding these five mistakes takes a few extra minutes of research. In return, you get hardware that actually lasts, instead of a lock you’re replacing again next year.
Frequently Asked Questions
What is the most secure type of locks for a main door?
A deadbolt paired with a mortise lock is generally the most secure combination for a main entrance. Together, they create two independent locking points.
Which type of locks is best for a bathroom door?
A cylindrical privacy lock is the standard choice for bathroom doors. Look for a rust-resistant finish and an outside emergency-release slot.
Are smart locks safe to use in India?
Yes. Most smart locks sold in India include a physical key override and battery backup. This means power cuts and dead batteries won’t lock you out.
How long do bathroom door locks usually last?
A quality cylindrical lock with corrosion-resistant coating typically lasts five to eight years in a humid bathroom. Uncoated hardware usually lasts only two to three years.
Can I install a lock myself, or do I need a professional?
Rim locks, padlocks, and most cylindrical locks are simple enough to install yourself. Mortise locks and deadbolts, however, usually need a carpenter or locksmith.
Final Thoughts
Choosing between the seven types of locks comes down to matching the lock to the door and the risk involved. Main doors deserve a mortise lock or deadbolt. Bathroom doors need a moisture-resistant cylindrical lock. Cabinets or gates do fine with a padlock or magnetic latch.
If you’re updating your bathroom hardware specifically, Fab Bath Interiors’ lock systems are built for humid, high-use environments. As a result, they’re a practical starting point for your next renovation. For a closer look at moisture-resistant hardware options, browse the full lock systems range before you finalize your shortlist. In the end, getting this one decision right saves you a repeat renovation a few years down the line.