The Yale mortice Deadlock lock that meet all applications and security needs. A mortice lock is set inside the door itself to ensure a flush finish rather than being surface mounted. A mortice Deadlock lock is best suited to work with wooden doors. This mortice Deadlock is 5 lever. The greater number of levers in the lock the more secure your door will become. The most secure is a 5 lever mortice Deadlock lock Yale 5 Lever Essentials Mortice Deadlock ideal for wooden doors that need a high level of security For ensured security, this lock offers security Available in a Chrome finish, the mortice lock has a 2.5 Inch/64 mm backset Supplied with two standard Yale keys; additional replacement keys can be ordered from a locksmith When used with a British Standard nightlatch and with door handles, this mortice lock can be used on external doors Specifications Factory Code: YES-5LDL-CH-64 2.5" or 64mm wide case Deadbolt locked and unlocked by key from either side Suitable for use on internal 44mm thickness doors Anti-Drill Lock Case 20mm Anti-Saw Deadbolt Lock suitable for Internal and External Doors Supplied in box: Lock, 2 keys, steel box striker, forend face plate, screws and fitting instructions with template