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L4V Hook Deadlocks L4V hook deadlocks are an upgrade for front and side van doors, as well as tailgates and cab doors. They work independently of the manufacturer's locking system and are secured using a a high-security key. This product, created to stop 'peel and steal' attacks has been tested independently and can increase resistance by as much as 300 percent. It is perfect for multi-drop couriers as well as applications where the driver might forget to lock the vehicle door. Hook De