Description This British Standard 5-lever mortice deadlock is designed for timber doors hinged on either side, suitable for doors up to 54mm thick. It features a 20mm deadbolt that can be locked or unlocked with a key from either side, providing secure deadlocking and enhanced resistance against forced entry. The lock includes anti-pick, anti-saw, and anti-drill security features, with a chamfered bolt design that improves performance under side-load testing and makes drilling attacks more difficult. It is supplied with a matching covered escutcheon for a neat finish. Specifications Size: 81mm Backset: 57mm Finish: Satin Brass Compatibility and Accessories Suitable for timber doors hinged on either side, up to 54mm thick Includes a strike plate finished to match the lock Supplied with square face plate covering a radius inner forend Rebate kits available in 13mm or 26mm (model 2100REB) Keying options available for different or same key groups Includes 2 nickel-plated steel keys