Deadlocks are the most common type of supplementary vehicle lock, available in a wide range of door specific kits to meet your customer's requirements.

Deadlocks have an internal mechanism which only 'lifts' when the correct key is being used to unlock the device, this prevents the lock bolt being pushed back into the lock case. Cheaper 'deadlocks' often rely solely on the actual key barrel to provide 'deadlocking', resulting in a much lower level of security.