The Willenhall 3000 series mortice hook latch is used on sliding doors. This version does not feature a locking snib, but is supplied with a pair of handles. Formerly branded as Century.

These latches are unique and easily identifiable by their flush fit handles. The handles are recessed to allow the door to sliding without the handle fouling the pocket or recess. This version cannot be locked, but another version with a snib that prevents the handle from being moved is available.

In line with a number of other mortice locks, these locks feature a grey lock case but they have unique measurements that identify them from other mortice locks. Please refer to the line drawing for details.

This mortice lock is available in satin chrome finish only.

This latch features a hook, rather than an deadbolt as its used on sliding doors.

These latches feature a hookbolt. This operates in a similar way to a deadbolt, but once thrown, the hookbolt hooks on to the strike. This prevents the door from being slid open.

The hook throws automatically and can be retracted by the lever handle from either side.

The hookbolt cannot be locked and unlocked from either side.

This lock is supplied with a striking plate in a finish which matches the lock. It also comes with a pair of handles which are recessed.

Suitable for use on most internal, sliding, wooden doors. These locks are not handed.

No keys are required for this latch.

These locks are not suitable for use on fire doors.

Willenhall locks is one of the most well established mortice lock brands in the UK. They make some unique locks that you won't find anywhere else.

A regular latch and deadbolt isn't much use on a sliding door as they will simply slide out of the strike. Sliding door locks feature an expanding claw or hook to lock on to the strike, to prevent the door from being opened once engaged. They are locked from both the inside and outside with the key which throws the deadbolt. Mortice lever locks (sometimes called mortise locks) are commonly fitted to wooden doors but can also be found used in steel, aluminium, and composite doors. They are locked from both the inside and outside with the key which throws the deadbolt. By definition, a mortice lock is fitted (“morticed”) within the door, rather than being fitted to the face or surface of it.

There are multiple types of lever lock in use in the UK. Dead locks (mortice dead locks) are operated by a key only whereas sash locks (mortice sash locks) feature a dead bolt and a latch which is operated by a handle (often a lever handle). Both lever locks with throw the dead bolt into a strike plate. The strike plate on sash locks also accepts the sprung loaded reversible latch.

Lever mortice deadlocks can be used for fitting to front or back doors and to internal doors and external doors, but we’d always recommend fitting a British Standard BS3621 product to external doors for maximum security. You should also check with the houseowner’s insurer’s requirements on both residential properties and commercial properties. You may find lever locks fitted to commercial properties but cylinder lock cases operated by a cylinder or pin tumbler lock are more common mortice locks fitted in commercial environments.

Lever mortice door locks are commonly used for internal doors too. These tend to be 3 lever mortice locks where the requirements for security and burglary prevention are lower.

When replacing an existing lever mortice lock, you may find that your replacement mortice lock is larger than the one that you are replacing. This may be because you are improving security, such as upgrading to a lock with thicker, anti-drill hard steel plates or because the forend length, forend width or the design of the lock has changed. The hole for the lock can normally be made larger with a hammer and chisel. This can also be the case for strikes, which may have changed design.

When fitting a lever mortice lock to new timber doors, we’d recommend using Souber’s DBB morticer for quick results. You can find the DBB1 morticer here: https://www.duffells.com/souber-dbb-mk2-mortice-jig.html.

Please always ensure that your door is sufficiently thick to accommodate the mortice lock that you are fitting. The Master Locksmith Association recommend a minimum thickness of 44mm.

A lever mortice lock prevents a door from opening by throwing a bolt from the lock into a metal keep or strike, fitted to the frame. Once the bolt is engaged in the keep, a hinged door is prevented from being opened. A mortice lock bolt is locked or unlocked from either the inside or outside by a key. Inside the lock, there is space for the bolt to be retracted. If the cuts in the key match the levers inside the lock, the user will be able to turn the key to throw (to lock) or withdraw (to unlock) the bolt. If the wrong key is used, the levers will not line up and the lock will not operate.

Duffells stocks a huge range of mortice locks at all levels of security. All of our lever mortice door locks are available for delivery in as little as 24 hours. We offer a range of express delivery options as well as standard delivery and you can find delivery details on our thousands of products on our delivery info page.

Sliding Hook/Claw