General description This Yale P77BLX Traditional Nightlatch features a hardened case finished in Brasslux and a polished brass cylinder. It is part of the Yale 77 Series, known for its classic styling and reliability. The nightlatch is key-operated from the outside and has a knob handle for operation from the inside. It is supplied with 2 keys and is packaged in a Visi Pack. Technical specifications Backset: 60mm Finish: Brasslux Cylinder Finish: Polished Brass Security Rating: Standard Supplied with: 1109 external cylinder Other information