5 Lever British Standard Sashlocks
This type of lock is typically found on External door to meet current insurance requirements. All 5 Lever British Standard locks are required to meet BS3621. British Police recommend 5 Lever British Standard Locks on all external doors. 5 Lever British standard deadlocks are available in Masterkeyed and Keyed alike versions. 5 Lever British Standard Deadlocks available from Asec, Chubb, ERA, Legge, Securefast and Union in various colours and sizes.