Nightlatches for homes.  

Their are two major leading brands of lock suitable for insurance purposes where a sash lock or deadlock is not fitted to a wood/timber door.

Era BS 3621 nightlatch and the Yale BS3621 nightlatch both of which are shown on the image slider to the right.

Double locking nightlatches.

Their are double locking nightlatches suitable for when an additional lock for child safety is required and standard nightlatches also available.