General description Yale's P2 Double Locking Nightlatch is designed for high security, making it suitable for timber external doors and ideal for glass panelled doors. The lock features a hardened case finished in Dark Metal Grey and is supplied with 2 keys. It operates with a key from the outside and both key and lever handle from the inside, with the internal handle being lockable for added security. Technical specifications Case Width: 60mm Case Height: 88mm Case Depth: 30mm Backset: 40mm Security Rating: High Lock Type: Double locking nightlatch Bolt Length: 20mm (anti-carding) Cylinder: 6-pin high-performance Supplied with: 1109 external cylinder Other information