A Brief Introduction To The Willenhall CT12 7 Lever Safe Lock

Commonly found on low grade safes and gun cabinets as it has no security ratings such as ENV1300 or VdS.  Also very popular on underfloor safes, and for this reason, if you are making a 2 in 1 for this lock, it is worth using a longer than standard pick for ease of use in the deep neck of floor safes.

There are several versions of this lock, according to the Willenhall website (www.willenhall-locks.co.uk), the standard deadlock, a slam lock, flanged and nozzle versions, as well as a case that takes a standard euro profile cylinder.

Here we are looking at the most common lock, the deadlock.

This can be mounted in 1 of 3 positions, as shown by the keyhole. Not all caps have all the options available.

Case sizes are 60.3mm wide by 81mm high. Bolt throw is 11mm, bolt is 9.5mm thick, and the case is 16.5mm thick.

Key is 6.5g and sometimes 7g, depending upon how worn they are.

Internally the case is fairly empty, with no internal relock trigger.  No barrel or curtain to prevent picking.

Note on this close up that the stump doesn’t have a serrated edge.

There are 5 lever heights in this lock, the similar Lowe and Fletcher 2802 has 4 lifts.  Also similar is the Ace lock, but beware, the keyhole is in a slightly different position and will not easily retro fit to the CT12.  Levers are made from polished brass.

Older versions of the lock have numbers stamped on the levers, 1 being a dead lift, 5 the highest.

 

 

 

 

 

 

 

 

 

 

 

 

Note the position of the anti pick notches on the levers if you intend picking using a 2 in 1.

Here are the 4 lever heights used in a random lock.  Notice how easy the key is to read, shown on the right.

A make up key should be a relatively simple project, allowing locks with broken keys to be opened, or the use of a scope to read the lever bellies.

If you do end up having to retro fit one of these locks, note that not all bolts are predrilled and tapped.

Sometimes the existing relocker strap may be welded to the bolt head, but it can easily be swapped into the new lock.

 

 

 

 

 

 

Picking should be fairly routine for anyone used to using a 2 in 1, although there is also a pin and cam available.  You can buy these from ebay for between £5-10, should you want to practice picking.  The lacket slot makes this easy, or you can drill and tap a hole for a small bolt to hold fewer levers as you practice.

 

Like I said, a basic intro to this lock,

Staff technical writer

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