In many cases an Insurance company require you fit a BS3621 British standard lock. All approved locks carry a Kite Mark as displayed on the right. All the locks in this section are BS 3621 insurance rated locks to meet insurance requirements.
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British Standard BS3621 Sash Locks. Sash locks have a latch and a deadbolt in the built of the lock. These locks would require handles to operated the latch. This should be the preferred choice for locks that are needed to secure the final exits of buildings. For example your front door or back door.
Dead door locks have a single 'dead' bolt that is locked and unlocked with a key. Dead locks are embedded in the door for extra strength, providing exceptional security and is specified by many insurance companies.
Rim Auto Deadlocking Cylinder Night Latches operates when the door closes, the lock will engage the deadlock and require a key to re-enter. Meaning the Nightlatch is secure against potential sliding attacks on the mechanism.
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