Double Cylinder Lock

The most common type of Euro Cylinder & Oval Cylinder Lock. This lock has a keyhole outside and inside

double cylinder lock diagram

A A-side Faces Outside
B B-side Faces Inside
C Total Length

Key & Turn Cylinder Locks

A lock operated from outside with a key & inside with a thumb turn (no key)

A A-side Faces Outside
B B-side Faces Inside
C Total Length

Half Cylinder Locks

A lock which can only be operated from one side of the door

A A-side
B B-side is not shown B-side in always 10mm
C Total Length