The best door security devices, compared.
Top pick: DHSWNNG door security bar Best value: Sandiyago sash jammer, pack of 4 – Four jammers at about £8.99, with 4.5 from 1,338 reviews, as a screwed extra beside a working lock. A cheaper wedge is an alert, and the battery is not in the box. Updated October 2026.
Door security means a second device on a door you already have: a floor bar, an under-door jammer, a swing bar, a patio handle clamp, a sash jammer, a concealed bolt, or an alarm wedge. A portable bar or a only helps if the door opens inward and the foot cannot slide. A printed force or decibel figure was not tested here. How to match the device to the door, the floor and whether you can drill is in the [door security buying guide](/hub/door-and-window-security/door-security/sub/door-security-buying-guide). A London or bar is fixed steel on the frame. That is a different product from a portable pole. None of these twelve replaces the lock you rely on when you leave the house.
Door security means a second device on a door you already have: a floor bar, an under-door jammer, a swing bar, a patio handle clamp, a sash jammer, a concealed bolt, or an alarm wedge.
44 products checked · 61 hrs invested · +27,300 readers
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Personal buying guide
Question 1 of 2
What do you need the device to do?
DHSWNNG lists a three-section alloy-steel bar at about £15.99, 690 g, and 48–133 cm, with a pivoting foot and a Y-fork under the handle. The amazon.co.uk line is 5.0 from 2 ratings, and the product file contains no review text, so there is no UK comment on slip, flex, or a real door. The listing says inward-hinged doors and also names patio and sliding doors, and it claims 400 pounds, which this comparison did not test. No screws are named, so on the page it is a tool-free brace. That length range is the widest in the set, which matters if your handle sits high, and it is also where other bars in this set feel weakest when fully extended. Until someone has written about this model, the price is the only solid reason to look at it, and the missing reviews are the reason to leave it.
Pros
Cons
Best for: You have measured a handle height inside 48–133 cm and you accept a listing with almost no reviews.
Less suitable: You want a reviewed brace, or you would treat a 5.0 from two ticks as proof of strength.
Specifications
Common questions
What length does the DHSWNNG bar cover?
The listing states 48–133 cm (19–52 inches), in three sections.
Does it need a drill?
The listing says you rotate the tubes and set the fork under the handle. No screws are named.
How many written reviews are in the product file?
The listing shows 5.0 from 2 ratings. The product file has no review text.
hzuisst lists a white handle clamp at about £19.99 and 720 g, model WH-KN6168-2, with 4.7 from 444 reviews. You snap it over two closed horizontal handles from the inside and press a button, with no key and no drill. The listing names French, patio, and conservatory doors and tells you to match the picture, which excludes vertical and curved handles. Fifty UK reviews call it easy, tidy in white, and sturdy, and one reviewer held the doors when the main lock had failed. That sample does not show a repeated breakage, and it also does not show how the clamp would cope with a determined attack. A weather-resistant line is a listing claim. It is the inside extra for a pair of handles that match the photo, after the multipoint has already thrown. It scores 94, higher than the floor-bar top pick, because the job is narrower.
Pros
Cons
Best for: Your French or patio doors have two horizontal handles and you want a removable inside clamp.
Less suitable: The handles are vertical or curved, the door is a single slider, or you need a cylinder upgrade.
Specifications
Common questions
Will this lock fit curved or vertical handles?
No. The listing says horizontal handles only, and tells you to match the picture.
Does it come with a key?
No. You press a button. It is fitted from inside.
Do you drill the door?
No. The listing says you snap it over the closed handles.
Across 12,833 amazon.co.uk reviews at 4.6, the white AceMining bar is the most-reviewed floor brace in this set, listed at about £23.99, 21–46 inches, and 998 g. UK reviewers describe a sturdy, easy adjustment and night-time use on a bedroom, front, or back door, and at least one reports that it holds on carpet. The repeated limit is flex once the bar is extended, which sits beside the listing's 400 pound claim that this comparison did not test. The Y-type head needs a handle, and the page does not state hinged-door direction, so you still confirm the door opens inward and that the rubber foot can sit flush. It braces the door only while you are inside. It leaves a BS 3621 lock or a uPVC multipoint as the lock the insurer sources actually name.
Pros
Cons
Best for: You want a no-drill floor bar for an inward door with a handle, and you will set it only while you are inside.
Less suitable: The door opens outward, the foot would sit on a loose rug, or you need a device that still works when the house is empty.
Specifications
Common questions
Does this AceMining bar need tools?
The listing says it deploys with a lever and a three-stage bar. No drill is named.
How long is the white AceMining bar?
The listing states 21–46 inches. Weight on the listing is 998 g.
What do reviewers say about strength?
UK reviews in the product file call it sturdy and easy. At least one says it feels flexible once extended.
The black AceMining bar is listed at the same about £23.99 and the same 21–46 inches as the white bar, with the page calling it alloy steel at 1.32 kg rather than 998 g. amazon.co.uk shows 4.6 from 12,833 reviews, and the product notes say those themes match the white file, so you should read one pool of comments, not two tests. Reviewers call it sturdy and easy, including carpet on front and back doors, and they repeat the flex once the bar is extended. The listing claims 400 pounds and sliding-door use, neither of which was measured here, and it describes a tool-free brace with no screws. Choose it when you want the darker finish and the higher listed mass on an inward door with a handle. Skip it if you wanted fresh evidence that the black model behaves differently at full stretch.
Pros
Cons
Best for: You want the black finish of the same AceMining brace and you accept the shared review pool.
Less suitable: You need an independent set of reviews, an outward-opening door, or a foot that cannot sit flush.
Specifications
Common questions
Is the black bar a different length from the white one?
Both listings state 21–46 inches. This file lists weight as 1.32 kg and material as alloy steel.
Do you drill the door?
The listing describes a tool-free brace. It does not describe screws.
What is the repeated review complaint?
Reviews in this file say the bar can feel flexible when it is extended.
Defender Security's U 11316 is a satin-nickel swing bar at about £13.62 and 254 g, with 4.6 from 2,887 reviews and a thumb-turn rather than a key. The review notes took themes from 17 UK-labelled reviews in a 50-review read. Those reviews call it stronger and more solid than a door chain, easy to use when answering the door, and still working after about two years for one buyer. It screws on, and the fasteners are in the box. It did not suit a door that sits proud of the frame, because the bar cannot meet the keep, and it broke when the door was opened while the guard was engaged. One buyer disliked the supplied screws. The listing's breakaway figure of about 100 pounds was not tested here. Fit it when the door and frame are flush and you want a crack, not a barricade.
Pros
Cons
Best for: You can screw into a flush timber door and frame and you want a crack when you answer the door.
Less suitable: The door stands proud of the frame, the tenancy forbids screws, or you need a device you can pack.
Specifications
Common questions
Does this replace a door chain?
UK reviews describe it as stronger than a chain. It still only limits the opening.
Will it fit if the door sits proud of the frame?
A UK review says no. The door and frame need to be in the same plane.
Is it tool-free?
No. The listing includes fasteners and says you screw it on.
Amazon Basics lists a black alloy-steel bar at about £19.94, adjusting 73.6–114 cm and weighing 1.18 kg, with 4.5 from 3,169 reviews. Reviewers who like it call it sturdy for the money and say it fits under a door handle. The faults in the UK sample are specific: joints or metal pins come apart if you push while wedging it, the rubber foot slips on tile, and one unit arrived cracked inside packaging that looked intact. A removable head is the listing's answer for a sliding door. The bullet list does not include a lock. The details table names ANSI, which is a printed field rather than a test this site repeated, and a sliding-length note on that table is garbled. It is the bar to consider when you need that sliding head and you will check the joints before the first night.
Pros
Cons
Best for: You want a known-brand bar with a removable sliding head and you will inspect the joints.
Less suitable: Your floor is smooth tile, or you need a bar whose reviews do not mention parts coming apart.
Specifications
Common questions
Does the Amazon Basics bar include a lock?
The bullet list does not include a lock. It is a bar with a rubber foot and a removable sliding head.
What length does it adjust to?
The listing states 73.6–114 cm for the main adjustment.
What goes wrong in reviews?
UK reviews mention joints coming apart under pressure, slip on tile, and a cracked part on arrival.
Sandiyago sells four white cast-zinc sash jammers at about £8.99, 250 g for the pack, with 4.5 from 1,338 amazon.co.uk reviews. Each one screws on and the arm twists to lock, and the listing covers uPVC, wood, and composite, including sliding doors and vertical sashes. UK reviews call them solid for the money and easy, often two screws each, and one buyer used self-tappers on uPVC. Another stopped a dog opening a back door that had a thumb-turn, and one used them as a temporary hold on a uPVC door with a broken lock. The fit complaints are concrete: not enough spacers when a wide gap needed two per jammer, so only two of the four went on, and screws about 30 mm were too short for one door. They are a cheap extra beside a lock that already throws, and a weak choice if they are the only lock.
Pros
Cons
Best for: You can drill uPVC, wood, or composite and you want a low-cost extra beside a lock that already works.
Less suitable: You need a tool-free hotel device, or the frame gap needs more spacers and longer screws than the pack includes.
Specifications
Common questions
Can these go on a wooden window?
The listing says uPVC, wood, and composite doors and windows.
Are they tool-free?
No. Each jammer is screwed on. One UK review used self-tapping screws on uPVC.
What do reviewers complain about?
Too few spacers for a wide gap, and screws about 30 mm that were too short for one door.
Yale's PM444 pair is polished brass at about £11.46, 220 g, with 4.5 from 1,083 reviews. The bullets say wooden hinged doors and a key from inside only, and one UK buyer fitted both bolts in about half an hour. The same reviews complain that the supplied screws round off, that a key was already worn and slipping, and that the keyhole cover must sit at a right angle to the bolt. You need a drill and a chisel, and metal is not the stated fit. The details table lists the control method as App, which conflicts with the key, so follow the bullets. Two bolts are an extra on a wooden door you own, and a poor only way out of a flat, because you still have to find the key.
Pros
Cons
Best for: You own a wooden door thick enough to mortice and you will keep the key beside that door.
Less suitable: The door is uPVC or metal, you cannot drill, or this door is the only exit from a flat.
Specifications
Common questions
Can you fit these Yale bolts to a metal door?
The bullets say wooden hinged doors. Metal is not the stated fit.
Do they lock from outside?
No. The listing says the key works from inside only, and a key is supplied.
What fails in reviews?
Screws that round off, a key that wears and slips, and a keyhole cover that must sit at a right angle to the bolt.
DoorJammer's DJ3 is a red alloy-steel plate at about £22.72 and 210 g, with 4.4 from 2,799 amazon.co.uk reviews. It goes under an inswinging door rather than a handle, and the listing asks for about 3 mm of clearance. The maker's FAQ puts the upper gap near 33 mm and says most uPVC doors do not have the minimum. UK reviews mention hotels and Travelodge and a solid feel once it is set, and they also call set-up fiddly, say the body can skew, and find carpet less stable than a hard floor. One reviewer worried about pressure on the hinges, and removal is an upward pull. The listing's PAS 24 line and the Secured by Design secondary-device note do not certify your door. Pack it when the gap is real and you cannot drill.
Pros
Cons
Best for: You travel or rent, the door opens inward, and you have checked a gap of at least 3 mm on a flat floor.
Less suitable: The door opens outward, a weather strip fills the underside, or you need a screwed bolt on a wooden door you own.
Specifications
Common questions
Does the DoorJammer work on every door?
The listing limits it to inswinging doors with about 3 mm of clearance underneath.
Can you use it on carpet?
The listing says carpet, tile, and laminate on a flat surface. UK reviews say it is less stable on carpet.
How do you get it off in a hurry?
The listing describes a quick-release with an upward motion. No tool is required to fit it.
LuLobtg lists a black iron bar at about £12.99, up to 55 inches, in three pieces, at 710 g, with 4.4 from 32 reviews. The review notes cover 12 texts, 10 of them UK-labelled. Several of those reviews use it to hold a patio door open against a breeze, and one used it as a temporary brace when a dropped front door would not lock. The criticism is the mass: a reviewer calls the tube light and doubts it would resist a modest push. It may slip on wood, and one buyer found no instructions. The listing and the reviews do mention patio and sliding doors, which is more than a generic sliding line. Connect the sections, set the angle so the rubber meets the floor, and treat a breeze test as a hold-open, not as proof against entry.
Pros
Cons
Best for: You want a cheap three-piece bar to hold a patio door or to span a track, and you accept a light tube.
Less suitable: You want reviewed resistance to a push, or a bar with a large UK review sample.
Specifications
Common questions
Will this bar stop a forced entry?
The product file does not show a test. One UK reviewer calls the tube light and doubts it would resist a modest push.
Can it hold a patio door open?
Several UK reviews say they bought it for that, and that it holds the door against a breeze.
Does it need tools?
The listing says you connect the sections and press the adjuster. No drill is named.
Mengshen's MS-M681 is a black ABS wedge at about £8.98 and 97 g, with 4.3 from 2,290 reviews. It is a doorstop with the alarm off and a siren with the alarm on, using low, medium, and high on a side switch. Fifty UK-labelled reviews call it loud, easy, and useful for travel, cat-sitting, or sleeping alone, and they say the wedge works on laminate and wood as well as carpet. The 9-volt battery is not in the box, and reviewers say that should have been obvious because the cell is hard to find at short notice. Some people gave up on the siren and kept the wedge. The 120 decibel line is the listing's claim. Push it tight under an inward door. It remains an alert, not a rated lock, including on the night you forget the battery.
Pros
Cons
Best for: You want a packable noise-maker for travel or a night alone, and you will buy the 9-volt battery first.
Less suitable: You need a physical brace with no battery, or you are standing in a hotel with the shops shut.
Specifications
Common questions
Is a battery included?
No. The listing and UK reviews say you need a 9-volt battery.
Can you change how easily it triggers?
Yes. The listing has three sensitivity levels on a side switch.
Does it hold the door if the alarm is off?
The listing says it still works as a wedge with the power off. It is not a rated lock.
HNHMT's kit is about £9.14 and 227 g for a latch-style travel lock plus an alarm wedge, with 4.1 from 5,378 reviews. The review notes cover 50 reviews and only five were labelled United Kingdom, so the star count is a weak guide to UK hotels. Those UK texts say the lock did not fit the door, including a Premier Inn, while the wedge still worked and was loud enough to matter. A 9-volt battery is not included, the listing claims 120 dB, and one unit arrived in a resealed box. The listing says two latch-hole sizes, no tools, and removal in seconds. Pack it if you will test the claw in the strike and you already own the battery. If the latch misses, you are left with the same wedge idea as the Mengshen, in a kit that costs a little more and weighs more than the wedge alone.
Pros
Cons
Best for: You want a cheap two-piece kit and you will test the latch on your own door before you rely on it.
Less suitable: You need a hotel lock that fitted in the UK reviews on file, or you want DoorJammer's brace without a battery.
Specifications
Common questions
Does the portable lock fit every hotel door?
No. UK reviews say it did not fit, including a Premier Inn door. The wedge still worked for those reviewers.
Is the battery in the box?
No. The listing says one 9-volt battery is not included.
Do you need tools?
The listing says no tools, and that you can remove the lock in seconds.
This comparison uses the twelve amazon.co.uk listings and the review notes gathered for them. There was no lab test. A listing line of 400 pounds, about 100 pounds of breakaway, or 120 decibels is not scored as a measurement. The white AceMining bar is the top pick: it scores 92, with 4.6 from 12,833 reviews, the largest sample in the set. The black AceMining bar and the Defender swing bar tie that score and do not take the award. The Sandiyago four-pack is the best value at about £8.99 for four, as a screwed extra beside a lock that already throws. A cheaper alarm wedge does not take that place: the battery is not in the box, and it is an alert rather than a screwed extra. The hzuisst clamp scores 94 and stays a handle-only pick. The weights below sum to 100.
Door and job
30%Whether the device braces an inward door, limits the opening, clamps two handles, stops a sash, throws an inside bolt, or makes a noise. A floor bar on an outward door, or a clamp on vertical handles, does not score as a match.
Floor, gap and direction
25%Full contact for a rubber foot, no loose rug, and about 3 mm under the door where DoorJammer is the device. The maker says most uPVC doors do not have that gap. Direction comes from the listing, not from a guess.
Fixings and escape
15%No-drill devices for renters and hotels. Screws or a mortice only where you own the door. You must be able to lift a bar or find a bolt key at once. Key-only hardware on a shared escape scores down.
Review evidence
20%The amazon.co.uk star line and review count, then a deduction when the file has two ratings and no text, or when UK reviews describe flex, slip, a missed hotel latch, or parts coming apart.
Shelf price
10%The GBP shelf price against a device a UK review can use for the job named. About £8.99 for four jammers beside a working lock scores here. A low price with two ratings does not.
Match the device to the door before you compare the shelf price. A floor bar, a jammer, a swing bar, a handle clamp, a sash jammer, a bolt and an alarm wedge are different jobs. The notes below follow the twelve amazon.co.uk listings and the public UK sources at the end of this page. There was no laboratory test, and a printed force or decibel figure is not treated as one.
Door security here is an extra device on a door you already have. The twelve listings cover a telescopic floor bar, an under-door jammer, a screwed swing bar, a clamp for two horizontal patio handles, sash jammers, a concealed bolt and an alarm wedge. A London or Birmingham bar is fixed steel on the frame. That is a different product from a portable pole. None of these twelve replaces the lock you rely on when you leave the house. The job comes first.
Floor bars and DoorJammer brace a door that opens inward. An outward-opening door needs the main lock and hinge bolts. A listing line that also says sliding was not tested here.
The rubber foot needs full contact. A loose rug lets it slide. Mengshen and HNHMT ship without the 9-volt battery. Sash jammers and a handle clamp sit beside a lock that already throws. They do not replace it.
Yale PM444 is keyed from inside. You must find that key at once. London Fire Brigade guidance is that an escape door opens from the inside without a key. Do not make these bolts the only way out of a flat.
Match the device to the way the door moves before you compare prices. The floor bars in this set are the two AceMining bars, the DHSWNNG bar, the Amazon Basics bar and the LuLobtg bar. They run from a handle or a track down to the floor, and they help an inward-opening door while you are inside. An outward-opening door needs the main lock and hinge bolts, not a pole on the floor. DoorJammer is also inswing only.
No-drill devices are the honest choice when you rent, travel, or cannot put a hole in the door. That group includes the AceMining bars, DoorJammer, the Mengshen wedge, the HNHMT kit and the hzuisst clamp. Screws are required for the Defender swing bar, the Sandiyago sash jammers and the Yale PM444 bolts. Yale is stated for wooden hinged doors, keyed from the inside, and metal is not the stated fit. Two bolts are an extra, not the only way out of a flat, because you still have to find the key.
Three typical situations, each with a recommendation from this comparison.
You want a no-drill floor bar for the hours you are inside, and you will still lock the main lock when you leave. The white AceMining bar is the top pick at about £23.99, with 4.6 from 12,833 reviews. Confirm the door opens inward and that the rubber foot can sit flush. UK reviews mention flex once the bar is extended.
You cannot drill, and you need something that packs. DoorJammer DJ3 is about £22.72 and 210 g, with 4.4 from 2,799 reviews, for an inswinging door with about 3 mm underneath. The maker says most uPVC doors do not have that gap. UK reviews mention hotels, and a weaker hold on carpet.
You own a wooden door and you want a concealed extra, not the only way out. The Yale PM444 pair is about £11.46, with 4.5 from 1,083 reviews, keyed from inside. Keep the key beside that door. If you want a cheaper screwed extra beside a lock that already throws, the Sandiyago four-pack is the best value at about £8.99.
The white AceMining bar is the top pick. It scores 92 at about £23.99, with 4.6 from 12,833 reviews, and it leads on that review volume. The black AceMining bar and the Defender swing bar tie the score and do not take the award. UK reviews mention flex at full stretch, and the 400 pound listing line was not tested. The hzuisst clamp scores 94, and it is the pick only for two horizontal handles. The Sandiyago four-pack is the best value at about £8.99, with 4.5 from 1,338 reviews, as a screwed extra beside a lock that already throws. Spacer count and screws of about 30 mm are the limits. None of the twelve replaces a BS 3621 lock or a uPVC multipoint.
Sandiyago sash jammer, pack of 4
Four jammers at about £8.99, with 4.5 from 1,338 reviews, as a screwed extra beside a working lock. A cheaper wedge is an alert, and the battery is not in the box.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources used for this page in October 2026. Prices, stars and review counts are the amazon.co.uk figures on the twelve listings. No add-on here is treated as PAS 24 or Approved Document Q for your door, and printed force and decibel lines were not tested.
Expert source (DIY & tools): Charlie White (Charlie DIYte) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk with the tag pcuk26-21. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing lines in this comparison. We did not run a lab test.
