Bramah lock

In the same year he started the Bramah Locks company at 124 Piccadilly, London.

The end of the key has a number of slots of different depths which, when inserted into the lock and pressed against spring tension, would depress a number of wafers to a specified depth and enable the key to turn and open the lock.

[2] The lock's innovative design presented a unique engineering challenge to create tools capable of making the different parts involved.

[7] The Bramah company is currently based in Fitzrovia, London and Romford, Essex.

[4] Though no longer thought to be completely unpickable, the venerable design is still sold as a very secure lock.