Cylinder replacement

A cylinder replacement means swapping the lock cylinder, the part the key goes into, for a new one with different keys. The lock stays in the door; only the cylinder is changed, and it comes out by undoing a screw in the forend.

It is the first thing worth doing when you move into a home you have bought or rented, when you lose a set of keys or if they are stolen. It is also a way of improving security by fitting a cylinder protected against bumping and snapping.

The important thing is to measure it properly, each side from the central screw to the edge, so it does not stick out from the door. A cylinder that sticks out snaps easily. Send us a photo and we will tell you what size it is. More under cylinder replacement.