Features:5 lever British Standard High Security Mortice LockMeets the requirements of BS3621:2017 and is suitable for the demands of the insurance companies and the PoliceHigh security levels are delivered by a 20mm bolt throwHardened steel plates on both to resist drilling.Twin hardened steel plates in the Deadbolt resists hacksawingSashlock features an easily reversible latch bolt without the removal of the lock cover 1,000 key variations for added security Suitable for External Doors10 Yr Mechanical Guarantee