Yale Deadlocking Standard Nightlatch Security Lock 40mm.
• 40mm Backset - Recommended for doors where there is a restricted width to mount a lock.
• Supplied with a 1109 cylinder.
• Suitable for both left and right handed, inward opening doors up to 57mm thick.
• Latch can be deadlocked by the snib button internally, making the lock inoperable by key or handle.
