This high security Yale Deadlocking Nightlatch features an internal lockable handle and automatic deadlocking. It includes anti-bump technology for greater security and peace of mind. The nightlatch is supplied with a Yale 1109 5 pin cylinder and two keys. The inside handle can be deadlocked by a reverse turn of the key in the outside cylinder after closing the door. It also has a snib button to deadlock or hold back the latch from the inside, making the lock inoperable by key or handle when snibbed. This model is a standard design with a 60mm backset in a gun metal finish. It comes with a two year manufacturer's mechanical guarantee. This reliable and secure front door latch is key-operated from the outside and lever-operated from the inside. The latch automatically deadlocks upon closing the door.