This Yale Deadlocking Nightlatch provides high security with an internal lockable handle and automatic deadlocking. It is supplied with a Yale 1109 5 pin cylinder and two keys. The lock features anti-bump protection for enhanced peace of mind. Designed with a standard 60mm backset and a brasslux finish, it is a popular and reliable choice for front doors. The inside handle can be deadlocked by a reverse turn of the key from the outside, preventing internal operation without the key. A convenient snib button allows you to either deadlock the latch or hold it back from the inside, making the lock inoperable by key or handle when engaged. It comes with a 2 year manufacturers mechanical guarantee.