5 lever mortice locks
Mortice locks must have a minimum of 5 levers and at least 1000 key combinations, a saw resistant bolt with a minimum 14mm throw and able to withstand 300lbs side and 5000lbs end pressure. A Drill resistant lock case and one or more anti-pick devices.
The Association of British Insurers (ABI) guidelines require all final exit doors to be fitted with 5-lever mortice locks (or equivelant) conforming to BS 3621 and marked with the BS Kitemark. Rack bolts or security bolts generally fitted to rear back doors.
Please contact me if in doubt about your security for home or business. I fit British Standard mortice locks for wooden or metal doors.