The Union 2100S StrongBOLT British Standard 5 Lever Mortice Deadlock is designed for timber doors hinged on either side and fits doors up to 54mm thick. The 20mm deadbolt locks or unlocks by key from either side, providing secure deadlocking and enhanced resistance to attack. It features anti-pick, anti-saw, and anti-drill security, with a chamfered bolt design to improve performance under side-load testing and make drilling attacks harder. The lock comes with a covered escutcheon matching the forend, and the hardened steel pins further increase protection against sawing. This lock is recommended by insurance companies and meets the BS3621: 2007 British Standard. It has a 10-year guarantee and is easy to install with a radius inner forend, suitable for many UK mortices without extra carpentry work. The StrongBOLT 2100S also includes keyhole protection and hardened steel rollers for additional security. Key Features: 20mm deadbolt with hardened steel rollers Supplied with square face plate and matching escutcheon Available with Rebate Kit 2100REB (13mm or 26mm) Keying options: to differ, pass, or keyed alike Supplied with two steel nickel-plated keys Specifications: Size: 81mm Backset: 57mm Finish: Satin Brass