Gear · listings read for 2026
Door Reinforcement Locks & Bars
The job buying time at the door, without blocking the way out
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These are Delay devices, and they are the only category on this site that can make a home more dangerous if fitted without thought. A device that holds a door shut from the inside holds it shut against everybody outside, including a firefighter and a paramedic. That is not a footnote. It is the first thing to understand about the entire category, and it is why every one of these is described here as something you engage while you are inside and awake, not something you leave set.
Ordering runs from the fixings that carry load to the fittings that leave no trace. A reversible option is worth more than a stated load figure when the door is not yours, and a stated load figure is a seller’s claim in either case.
7 listings
| Product | Fixing | Door swing | Removable | What the listing states |
|---|---|---|---|---|
| AceMining Door Reinforcement Lock | Screwed to door and frame | Inward only | Leaves screw holes | Listing states 800 lbs and 8 screws |
| AceMining Portable Door Lock | No fixings, hooks over strike plate | Inward only | Fully, leaves no marks | Listing states portable, no tools required |
| EverPlus Door Reinforcement Lock, 2-pack | Screwed to door and frame | Inward only | Leaves screw holes | Listing states 800 lbs, two-pack |
| Door Reinforcement Lock with Night Latch | Screwed to door and frame | Inward only | Leaves screw holes | Listing states 800 lbs and a night-latch position |
| FATLODA Barrel Bolt Latch, 3 in, 2-pack | Screwed to door and frame | Inward or outward | Leaves screw holes | Listing states stainless steel, 3 inch, two-pack |
| Fitoon Security Door Chain, 2-pack | Screwed to door and frame | Inward only | Leaves screw holes | Listing states thickened chain, 12 screws, two-pack |
| Childproof Door Reinforcement Lock | Screwed to door and frame | Inward only | Leaves screw holes | Listing states a childproof reinforcement latch |
Eight screws into the frame, per the listing
AceMining Door Reinforcement Lock
Flip latch, inward-swinging doors, 8 screws per listing
A flip latch that mounts high on an inward-swinging door and drops into a bracket on the frame, and the listing states it withstands 800 lbs with eight screws. The load figure is the seller’s, not ours. What it does in practice is put a second point of restraint away from the deadbolt, so force at the lock line meets a fixing somewhere else.
- Adds restraint high on the door, away from the deadbolt
- Listing states eight screws for mounting
- Flips out of the way when you are not home
- Sits above the lock line where doors are usually unprotected
- It locks from the inside only, so nobody outside can open the door
- Inward-swinging doors only
- Drilling into a fire-rated door can void its rating
Best for An inward-swinging front door in an occupied home, engaged only while people are inside.
No tools, nothing left behind
AceMining Portable Door Lock
Portable travel latch brace, no tools
A portable brace that hooks over the strike plate of an inward-swinging door and blocks the latch, with no tools and no fixings. It goes in a bag and comes out in a hotel room, a dorm or a rental. Because nothing is screwed to anything, it is the one option here that leaves no trace and breaks no lease clause about alterations.
- No drilling, so nothing to make good when you leave
- Fits in a pocket and travels
- Adds restraint at the latch without touching the lock
- Removed in a second when you leave the room
- It locks from the inside only, so nobody outside can open the door
- Only works on inward-swinging doors with an accessible strike plate
- Nothing holds it in place if you are not there to fit it
Best for Hotel rooms, dorms and rentals where nothing may be screwed to the door.
Two units in the box
EverPlus Door Reinforcement Lock, 2-pack
Two flip latches, inward-swinging doors
The same flip-latch idea as the single units here, supplied as two, for inward-swinging doors only, and the listing states it withstands 800 lbs. Two in a box is the practical case: most homes have a front door and a back door, and a second layer on only one of them is a half measure. The load figure is a listing claim and nothing more.
- Two units cover a front and a back door in one order
- Adds restraint above the deadbolt line
- Flips clear when the house is empty
- Same fitting method on both doors, so one set of measurements
- It locks from the inside only, so nobody outside can open the door
- Inward-swinging doors only
- Drilling into a fire-rated door can void its rating
Best for A house where the front and back doors both swing inward and both need a second layer.
Door Reinforcement Lock with Night Latch
Flip latch with night-latch position, 8 screws per listing
A flip latch with a night-latch position, for inward-swinging doors only, and the listing states it withstands 800 lbs with eight screws. The night-latch position lets the door open a hand’s width to speak to somebody without unlatching it entirely. That is a narrower use case than it sounds, and it is not a substitute for looking through a camera first.
- Night-latch position allows a partly opened door
- Listing states eight screws for mounting
- Adds restraint high on the door
- Flips clear when not in use
- It locks from the inside only, so nobody outside can open the door
- Inward-swinging doors only
- A partly opened door is still an opened door
Best for An inward-swinging door where you sometimes need to speak to somebody without fully opening it.
FATLODA Barrel Bolt Latch, 3 in, 2-pack
3 inch stainless slide bolt, two-pack per listing
A stainless steel slide bolt, listed at 3 inches and supplied as a pair, that throws a bar across the gap between door and frame. It is the simplest added restraint there is: no battery, no radio, just metal into a keeper. Fitted top or bottom it adds a second holding point away from the main lock, though it locks from the inside only.
- Adds a holding point away from the main lock
- Listing states stainless steel construction
- No battery, no network, nothing to update
- Two in the box covers two doors or two points
- It locks from the inside only, so nobody outside can open the door
- Only as strong as the screws and the frame behind them
- Drilling into a fire-rated door can void its rating
Best for A back or interior door that needs a plain second bolt away from the handle.
Fitoon Security Door Chain, 2-pack
Thickened door chain, two-pack, 12 screws per listing
A thickened security door chain in black, listed as a two-pack with twelve screws, that lets a door open a hand’s width while staying restrained. A chain is a talk-through device, not a barrier, and a partly opened door is still an opened door. Fit it as a supplement to a deadbolt, never as the thing holding the door.
- Lets you speak through a gap without unlatching fully
- Listing states a thickened chain and twelve screws
- Two in the box covers a front and a back door
- Simple to fit with no power or app
- A chain is a talk-through device, not a barrier
- It restrains from the inside only
- Only as strong as the screws and the frame behind them
Best for An apartment door where you want to speak to a caller before fully opening it.
Childproof Door Reinforcement Lock
Childproof flip latch for inward-swinging doors
A flip-latch reinforcement lock for inward-swinging doors, listed as childproof and mounted high where a small child cannot reach it. It adds a restraint above the deadbolt line and flips clear when the house is empty. Like every device in this group it holds the door against everyone outside, so it is engaged while people are inside and awake.
- Adds a restraint high on the door, above the deadbolt
- Mounted out of a small child’s reach, per the listing
- Flips clear when the house is empty
- Fits a standard inward-swinging door
- It locks from the inside only, so nobody outside can open the door
- Inward-swinging doors only
- Drilling into a fire-rated door can void its rating
Best for An inward-swinging door in a home with young children, engaged while people are inside.
Why those badges
Each badge stands on something stated in the listing or countable in the data, not on a general impression.
- Eight screws into the frame, per the listing — AceMining Door Reinforcement Lock. Eight fixings is the highest screw count stated on any single-unit reinforcement lock here, and the fixings are what carry load into the frame.
- No tools, nothing left behind — AceMining Portable Door Lock. It is the only item in this category that fits without screws, which is the whole difference for a lease that forbids drilling.
- Two units in the box — EverPlus Door Reinforcement Lock, 2-pack. It is the only multi-pack in this category, which is what makes covering a front and a back door one purchase.
Questions people actually ask
Do these really hold 800 lbs?
Several listings here state that figure. We have not measured it, we do not know the test it refers to, and the number tells you nothing about the screws in your particular frame or the softwood behind them. Treat it as a claim printed on a box. What load a fixing carries depends on the frame it is fixed into, which is unique to your door.
Can I use one of these on a door that swings outward?
No. Every flip latch here is listed for inward-swinging doors only, because the mechanism relies on the door closing into the frame past the bracket. On an outward-swinging door the effort belongs in the hinges and the strike side instead.
Is a reinforcement lock allowed in a rental?
Anything screwed to a door or frame is an alteration, and whether that is permitted is a matter for your lease and your landlord. The portable brace here fits without tools and leaves nothing behind, which is why it is the one that suits a rented door. Ask before drilling rather than after.
What about fire doors?
Drilling into a fire-rated door or frame can void the rating that door was certified with, and a door that has lost its rating is no longer doing the job it was fitted for. If there is any chance your door is fire-rated, and in shared buildings it very often is, ask the building manager before putting a screw in it.