Identify your lock

A 5 lever sash mortice deadlock is commonly fitted to wooden doors and can be locked from both sides of the door with a key, they are fitted within the door, rather than on the surface.They also come a a mortise only version. These can be keyed alike with a similar 5 lever lock.

Commonly found on upvc & composite doors.Euro profile cylinders are locked from either side of the door and can also come with a thumb-turn. They can also be keyed alike with various other euro profile cylinders.

This is a rim cylinder, commonly refered to as a 'yale'

similar in style and use as the 5 lever mortise the 3 lever mortise has a lower level of security and is usually used on internal doors or garages.

This is a oval cylinder.similar in style to a euro cylinder please note the shape.

This is a screw in cylinder.usually found on commercial aluminium doors.Can have a screw in cylinder on both sides or a thumb-turn.