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L4V Hook Deadlocks L4V hook deadlocks are an upgrade to the rear and side van doors, as well tailgates and doors to the cab. They operate independently of the locking system and are secured using a a high-security key. This product, designed to combat 'peel-and-steal' attacks, has been independently tested and can boost resistance by as much as 300%. It is ideal for multi-drop couriers and applications where the driver may forget to lock the door of their vehicle. Hook Deadlock A hook deadlock is a lock that