All locks fitted in households today fall in to 3 different categories of locks.

 

Five-lever mortice deadlock conforming to BS 3621

This is the typical lock fitted to most wooden doors to comply with Insurance companies.

 

Deadlock mortice conforming to BS3621

 

Key-operated multi-point locking system

This is a rim-locking system that bolts the door into the frame and offers a higher level of security.

 

Key-operated multi-point locking system

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Rim automatic nightlatch with key-locking handle

These offer extra security at night, allowing homeowners to lock their doors more securely from the inside.

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Rim automatic deadlatch with key-locking handle