Used with the CY413 single cylinder with lockable thumbturn and the LC801 tubular deadbolt lock case. Operated from outside the door by a key and inside by the thumbturn. The thumbturn can be locked in place to provide double cylinder security. This product has ABLOY PROTEC² -lock system. ABLOY PROTEC² is a factory level locking solution. Every key is carefully controlled and is only made at Abloy Oy's factory. The keys have a patented sliding element that increases key security. Can be masterkeyed and keyed alike Supplied with 3 keys and a keycode card Backset 2 3/8- 2 3/4  or 60mm-70mm Suitable for door thickness 1 3/4 to 2 3/4 or 45mm-70mm