Independent comparisons. We may earn from shop links. More info

Best additional door lock for the door you have

Updated: October 2026

The best additional door lock is not the listing with the highest star rating. Sort this aisle by stars and a loop latch with almost no UK reviews sits next to a handle clamp, while the brace with thousands of reviews is a hotel tool. You want one pick for one door: a hinged uPVC door while you are in, two horizontal French-door handles, or an inward hotel door with a gap. If your door is none of those, skip the shelf. Prices are on the [additional door lock comparison](/hub/door-and-window-security/additional-door-lock). Peter F. compared the twelve amazon.co.uk listings in October 2026, with no lab test. A qualifying purchase can earn a commission at no extra cost to you.

The best additional door lock is not the listing with the highest star rating.

Our top picks

hzuisst hzuisst French door handle lock

Best overall

hzuisst hzuisst French door handle lock
9.0/10about £19.99
View offer
Sandiyago Sandiyago sash jammer, 4 pack

Best value

Sandiyago Sandiyago sash jammer, 4 pack
8.6/10about £8.99
View offer
Door-Jammer DoorJammer DJ3 portable door lock

Rank 3

Door-Jammer DoorJammer DJ3 portable door lock
8.4/10about £22.72
View offer
On this page
  1. 1.Best only means best for a stated door
  2. 2.While you are in on a hinged uPVC door
  3. 3.French doors and travel
  4. 4.What not to call the best security lock

Best only means best for a stated door

A single winner fails because the products do not share a door. The comparison's top pick is the hzuisst handle clamp: 4.7 from 444 reviews, fifty with UK headers, on white uPVC French and patio doors at about £19.99. The best value is the Sandiyago four-pack, about £8.99 and 4.5 from 1,338 reviews. Those labels sort this shelf. They are not a police test and not a British Standard. The DoorJammer DJ3, 4.4 from 2,799 reviews, is the travel pick, not the pick for a typical uPVC back door. Keyed sash jammers, including Patlock, are not in these twelve listings. How the types differ is on the buying guide.

While you are in on a hinged uPVC door

For a hinged uPVC, wood or composite door, while someone is home to twist the arm, the Sandiyago four-pack is the pick in this set. The listing names PVC-u, wood and composite. Reviewers used it as a temporary hold when a uPVC back-door lock had failed. You still lock the multipoint, or the BS 3621 lock on timber. Screws are about 30 mm and were too short for some doors. Spacers sheared, and arm stiffness varies inside one pack. Do not put a binding arm on the only way out. The zgpzlhd six-pack is the same non-locking job at about £7.99, with 4.4 from 41 reviews. It is the larger count of arms, not the better-known fit. Where two arms go, and when to stop if the frame is hollow, is on the how to fit a sash jammer page.
hzuisst hzuisst French door handle lock

Testsieger

hzuisst hzuisst French door handle lock
9.0/10about £19.99
View offer

French doors and travel

For two horizontal levers, the hzuisst clamp is the pick. It is 34 cm long and 720 g. Reviewers put it on in about a minute when the main lock had failed, and it lifts off with a push button. Vertical and curved handles are outside the listing. It only works while you leave it on the handles. Treat a failed multipoint as a locksmith booking. For a hotel, a Travelodge, or a spare room with an inward door, the DoorJammer DJ3 is the pick. The listing asks for at least 3 mm of gap. One reviewer found that minimum still too tight. It is less stable on carpet, and the maker says most uPVC doors are unsuitable. Outward uPVC belongs on the uPVC extra lock page.

What not to call the best security lock

Do not call the cabin hooks a security lock. Strong stars there are people holding sheds and gates open, and a hook that slips lets a dog push a gate. Anobeyi is 4.7 from 107 reviews with one UK header. MeBantoo's title says stainless steel and the material field says aluminium. The PATIKIL bolt is 3.1 from eight reviews because buyers expected more than one lock. The Annakideya at about £12.99, 4.5 from 85, is the timber-edge bolt that can stay shut, with a review that the frame plate bent. The 800 lb line is the listing, not a test. Skip Moonybaby if the job is burglary. It is ranked in Baby Products.

Common questions

Which listing is the best sash jammer in this set?
The Sandiyago four-pack, about £8.99, 4.5 from 1,338 reviews. It is non-locking, so it only helps while you are in to twist the arm. Reviews cite screws around 30 mm and spacers that shear. The six-pack is cheaper per arm and has 41 reviews. Neither is a keyed jammer you can operate from the garden. A locking, through-frame jammer from a locksmith is a different product.
What should I buy for white French doors?
If both handles are horizontal, the hzuisst clamp at about £19.99. UK reviews fit it to white uPVC French, patio and conservatory doors in about a minute. If the handles are vertical or curved, that clamp is the wrong shape. A sash jammer is the alternative on a hinged leaf, and it needs screws. Do not force the clamp on and hope the button still releases.
Is the DoorJammer the best home lock?
It is the best travel brace in this set, not the best home lock. It has 2,799 reviews at 4.4 and costs about £22.72. It needs an inward door and a gap. The maker says most uPVC doors have no gap. It leaves with you, so an empty house is not held. A PAS 24 line on the device is not a PAS 24 door.
Why not the 4.7 loop latch?
Anobeyi's 4.7 comes from 107 reviews and one UK header. Reviewers wanted a deadlock and got a drop bar. A narrow frame would not sit flush, and one pack had corroded screws. MeBantoo's title and material field disagree. Stars without a UK sample are a weak reason to call either the best additional door lock.
Who should skip the child lever lock?
Anyone buying security. The Moonybaby pack is for a toddler and a lever, with adhesive and a two-button release. A toddler pulled one off on day one. It is awkward one-handed, it can be pulled off, and removal leaves marks. Parents blocking a stair door may still want it. It is not the extra lock for a final exit.
What is missing if I need a key from outside?
A locking sash jammer, fitted so you can operate it from outside, and a main lock that already meets the policy. The Master Locksmiths Association describes that jammer as a different product from a non-locking arm. None of these twelve listings is that keyed jammer. A locksmith supplies it. These packs do not.

Related pages

Portable or fixed additional door lock

Additional door lock

Extra door lock UK: choose the job before the brand

How to fit a sash jammer without locking yourself out

UPVC door extra lock beside the main cylinder

Sources

Public UK sources used for this page in October 2026. Prices, stars and review counts are the amazon.co.uk figures in this comparison. No lab test was run.

  1. Lichfield District Council, protect your home (retrieved October 2026)
  2. West Yorkshire Police euro-cylinder note (Walton Parish Council PDF) (retrieved October 2026)
  3. The AA, door locks and home insurance (retrieved October 2026)
  4. ProtectUK, security at home (retrieved October 2026)
  5. MLA sash jammers FAQ (retrieved October 2026)
  6. DoorJammer UK FAQ (retrieved October 2026)
  7. Cheshire Fire and Rescue, HMO fastenings (retrieved October 2026)
  8. DASH HMO lock guide 2023 (retrieved October 2026)