Door Latch Types: How They Work and Which to Use
Most doors use one of a handful of latch types: a spring (tubular) latch, a deadlatch, a mortise latch, a rim or night latch, a roller or magnetic catch, a panic or exit latch, or a simple slide, hook or chain latch. They differ in how they hold the door, how well they resist forcing, and where they belong. A latch keeps a closed door closed. A deadbolt is a separate bolt that locks it. Knowing that difference is the quickest way to pick the right hardware for a bedroom, a front door or a storefront.
This guide walks through each type in plain terms, explains the spring latch vs. deadlatch vs. deadbolt question, and shows where fit, fire codes and exit rules change the answer.
TL;DR
A spring latch holds a door shut but can be pushed back. A deadlatch adds a guard plunger that blocks that move. A deadbolt is a separate, non-spring bolt and is the strongest of the three.
Tubular latches suit most interior doors. Mortise and rim latches suit heavier doors and older or commercial openings. Slide, hook and chain latches add convenience, not forced-entry security.
A latch only works if the backset, door thickness, strike and alignment are right. A replacement that looks identical can still not fit.
Business, rental and fire-rated doors must also meet egress and fire-listing rules, so hardware should be chosen with a qualified locksmith.
Table of Contents
What a latch does, and what it does not
A latch is a spring-loaded bolt with a beveled end. When you close the door, the bevel hits the strike plate, slides in, and springs back out to hold the door. Turning the handle pulls it back. That is all a plain latch is built to do.
A lock is different. The Builders Hardware Manufacturers Association (BHMA) separates a latch bolt from a dead bolt: the latch bolt can be forced back, while a deadbolt does not retract under end pressure. So the useful question is not “which latch is strongest?” but “does this door need convenience, automatic latching, or a separate security bolt?”
For an exterior entry door, the latch alone is an incomplete answer. The strike, frame reinforcement, lock grade and exit requirements all matter as well.
The main door latch types
Tubular (spring) latches
This is the latch inside most residential knobs and levers. A round bore through the door face and a smaller bore in the edge hold a compact cylinder with the spring bolt. According to a Toolstation buying guide, a tubular latch is a simple option commonly used on internal doors where a lock is unnecessary or where the lock is a separate mechanism.
Best for: bedrooms, closets, hallways, bathrooms (with a privacy function). Watch for: on an exterior door, a plain spring latch is only as secure as the gap between door and frame allows. Where that gap is wide, a thin tool or card may be able to push the bevel back.
Deadlatches
A deadlatch looks like a spring latch but has a small second plunger, the guard bolt, next to the main bolt. When the door closes, the guard bolt presses against the strike and blocks the main bolt from being pushed back. BHMA’s terminology describes this as a latch that automatically locks the projected bolt against end pressure. For a main exterior door, a deadlatch is generally a better choice than an unguarded spring latch. It still does not replace a properly installed deadbolt when you want maximum resistance.
One catch: the protection exists only when that small plunger actually touches the strike. Door sag, a shifted frame, an oversized strike lip or too little latch projection can stop it from engaging. NFPA 80 committee material is built around the idea that doors and hardware perform as a complete assembly, which is why alignment is worth checking before you replace an entire lock.
Best for: exterior doors in a secondary role, apartment entry doors paired with a deadbolt, and any door that closes on its own.
Mortise latches
A mortise lock sits in a rectangular pocket cut into the edge of the door. It is a heavier, more complex body than a tubular latch and often combines the latch bolt, a deadbolt and sometimes a deadlatch in one case. Schlage’s commercial documentation lists tubular and mortise variants as separate configurations, along with exit trim for wide-stile doors.
Best for: older Delaware homes with original mortise doors, heavy or high-traffic doors, offices and storefronts. Watch for: you cannot swap a mortise body for a tubular lock without re-preparing the door.
Rim and night latches
A rim latch mounts on the inside face of the door instead of inside it, with a cylinder passing through. You see them on older doors, cottages, sheds and as add-on locks where cutting a pocket is not practical. They add a second point of locking without major door work.
Roller latches and magnetic latches
A roller latch uses a spring-loaded roller that clicks into a catch. It supports pull-to-close operation and is common on cabinets and light utility doors. Magnetic latches hold with a magnet instead of a spring. Per the same Toolstation guide, magnetic latches suit controlled commercial or specialized openings. Neither is a forced-entry device.
Slide bolts, chain latches, hook-and-eye and cabin hooks
These are holding devices. They keep a door from swinging open or let it open only a few inches. They give privacy and convenience, such as stopping a toddler from wandering out or keeping a bathroom door shut, but they should not be treated as primary security.
Gate and gravity latches
Garden and fence gates use gravity latches, thumb latches and similar hardware. They suit outdoor conditions, and corrosion is the usual failure. If a latch or lock is seizing from rust, our guide to what to do with a rusty door lock covers lubrication and when to stop and call a pro.
Panic bars and exit latches
Panic hardware is a latch designed so that pushing a bar releases it, even under crowd pressure. It belongs on many commercial and assembly doors. It also has its own rules, and we explain how to keep a UL listing when installing a panic bar.
Quick comparison
Latch type | Where it fits | Resists forcing? | Notes |
Spring (tubular) | Interior doors | Low | Simple, inexpensive, easy to replace |
Deadlatch | Exterior and apartment doors | Moderate | Needs guard plunger to meet the strike |
Deadbolt (separate) | Exterior doors | High | Does not retract under end pressure |
Mortise | Heavy, older, commercial doors | Moderate to high | Door must be prepared for the body |
Rim / night | Add-on locking, older doors | Moderate | Mounts on the door face |
Roller / magnetic | Cabinets, utility, special openings | Low | Convenience and closing |
Slide, chain, hook | Privacy and holding | Low | Not primary security |
Panic / exit | Commercial egress doors | Depends on listing | Must meet exit and fire rules |
Spring latch vs. deadlatch vs. deadbolt
These three get confused constantly, so here is the short version.
Spring latch vs. deadlatch. Both hold the door with a beveled spring bolt. The deadlatch adds the guard plunger, so once the door is shut, the bolt cannot be slid back with a card or thin tool. The spring latch has no such guard. On a bedroom door this makes no difference. On a front door it can.
Deadlatch vs. deadbolt. A deadlatch is still a spring-loaded bolt that is blocked when the door is closed. A deadbolt is a solid bolt with no spring, moved only by a key or thumbturn. It generally throws deeper into the frame and does not retract under end pressure. Many entry doors have both: a latch in the handle for everyday closing, and a deadbolt above it for locking up.
If you have a single latch on an exterior door, adding a deadbolt is usually the most meaningful upgrade. If you already have a deadbolt, check that the deadlatch guard plunger is hitting the strike. If the door has shifted, an alignment fix may cost less than new hardware.
How to choose the right latch
Start with the opening, not the product page.
Decide what the door must do. Close quietly, lock automatically, hold against forced entry, or let people out fast in an emergency.
Check the location. Interior, exterior, garage entry, storm door, gate, fire-rated corridor or stair door.
Measure. Backset is the distance from the door edge to the center of the bore. A Schlage commercial manual lists a standard 2 3/4-inch backset that can be adjusted to 2 3/8 inches, but that is one product’s example, not a rule for every door. Also note door thickness, edge bore, faceplate and strike size.
Check the handing and the prep. A replacement that looks similar may still be incompatible if your door is mortise-prepared and the new lock is tubular.
Match the grade. Commercial locksets are certified to ANSI/BHMA grades and, for some models, UL fire or access-control standards. Schlage’s documentation shows how those certifications are listed. Select by the certification the opening needs, not by appearance.
Installation instructions treat the latch as part of a fitted system. For example, Schlage’s ALX instructions distinguish dead latch and spring latch assemblies for different models and specify bevel direction relative to the door stop. Installing a latch backward is a common reason a door will not close.
Homes and rentals in Delaware
A typical Delaware house has a mix: tubular latches inside, a handle latch plus deadbolt on the front door, and often a keyed latch on a storm door. Beach rentals around Rehoboth and Milton see heavy use and frequent guest turnover, so rekeying and higher-security deadbolts matter more than decorative finishes. Landlords and property managers should also think about how many keys are in circulation.
A few practical points:
Latch won’t catch. Close the door slowly and watch the bolt meet the strike. Seasonal humidity can swell wood doors. Often the strike needs a small adjustment, not a new lock.
Door locks only when lifted. This points to sag. Tighten hinge screws before replacing hardware.
Storm door latch failing. These use lighter hardware and different prep. Our walkthrough on replacing a storm door lock shows what to measure before you buy.
Locked bathroom or bedroom door. Privacy latches usually have a small emergency release. See 5 fast, safe fixes for a locked bathroom door.
Wanting a smart lock. Smart locks typically sit on top of a deadbolt or latch, so check your backset and door prep first.
For wider background on home services, see our overview of residential locksmith services and solutions.
Business, multifamily and fire-rated doors
Commercial doors carry obligations that residential doors do not. Security cannot get in the way of exit.
NFPA guidance published in 2021 says doors in the means of egress must not be locked beyond occupant control. It lists unlatching force limits of 15 lbf for push, pull or slide hardware and 28 inch-pounds for rotating hardware. A stronger latch is not a safer door if people cannot get out easily.
Fire doors add another layer. Fire performance depends on the complete listed assembly, as the NFPA 80 committee material shows. A residential latch should not be swapped onto a labeled fire door without confirming the listing and installation requirements. The authority having jurisdiction and the door’s listing decide the final requirement.
If you manage an office, shop or apartment building, ask a locksmith to assess the opening before you buy. Modern openings can combine mechanical hardware with credentials, mobile access and monitoring, so the latch is only one part of the security system. Related reading: fail safe vs. fail secure locks and our commercial locksmith guide.
Our perspective
We see the same pattern on service calls across Delaware. People assume a lock problem is a hardware problem, and buy a new lockset. Often the latch is fine and the door has moved. A tightened hinge, a repositioned strike or a corrected bevel direction solves it in minutes.
When the hardware really is the issue, we think about what the door needs to do first. A bedroom needs a quiet tubular latch. A front door needs a deadlatch and a real deadbolt, correctly aligned. A storefront needs hardware that meets the opening’s listing and still lets people out. We would rather tell you a cheaper fix is enough than sell you a lock you do not need.
We are locally owned, you reach us directly and not a call center, and we come to you. That matters most when you are standing outside a locked door and want an honest answer about what is wrong.
— Brian
When to call a locksmith
DIY is fine for swapping a like-for-like interior latch. Call a pro when:
The door is an exterior, fire-rated or egress door.
You are adding a deadbolt, mortise body or smart lock and the door needs drilling or routing.
A key has broken in the lock or the latch is stuck while the door is shut.
You manage a rental or commercial property and need keying, master key systems or access control.
We offer mobile service across the state, including New Castle and Milton. Our services cover home lock rekeying, new lock installation, smart lock upgrades, high-security locks, panic bar installation and door hardware repair. See the full list on our locksmith services page. Pricing is not published, so describe the door and we will tell you what the job involves.
FAQ
What are the most common door latch types?
The most common are tubular spring latches, deadlatches, mortise latches and rim latches. Roller, magnetic, slide, chain and hook latches are used where closing or privacy matters more than security. Panic latches serve commercial exit doors.
What is the strongest type of latch?
No plain latch is the strongest security option, because a latch bolt can be forced back. A deadlatch resists that better than a spring latch. For maximum resistance on an exterior door, pair the latch with a properly installed deadbolt, a reinforced strike and a solid frame.
How do I know which door latch I need?
Identify the door’s location and purpose, then measure backset, door thickness and edge preparation. Check whether the door has a round bore (tubular) or a pocket in the edge (mortise). If you are unsure, a locksmith can confirm fit before you buy.
Is a deadlatch the same as a deadbolt?
No. A deadlatch is a spring bolt with a guard plunger that blocks it when the door is closed. A deadbolt has no spring and is moved only by a key or thumbturn. Many entry doors use both.
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