StrongBOLT 2100S BS 5 Lever Mortice Deadlock 68mm 2.5in Satin Brass Box - UNION J2100S-SC-3.0, The Union 2100S StrongBOLT British Standard 5 lever mortice deadlock is ideal for timber doors hinged on the left or right and they are suitable for doors up to 54mm thick. The 20mm deadbolt is locked or unlocked by the key from either side, and gives a secure positive deadlocking and additional resistance against attack. 2100S features an anti-pick, anti-saw and anti-drill security, chamfered bolt design that increases the performance of the lock under side load testing. The chamfer of the bolt also makes drilling attack more difficult. Supplied with covered escutcheon to match forend. The StrongBOLT series of locks are recommended by insurance companies, kitemarked to BS3621: 2007 (British Standard) and have been approved by the police Secured by Design initiative. They are also covered by a 10 Year guarantee. The radius inner forend for ease of installation, can be installed into many U