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L4V Hook Deadlocks L4V hook deadlocks are an upgrade to side and rear van doors, as well as tailgates and doors to the cab. They are not tied to the manufacturer's locking system and secured with a high-security key. Specially designed to ward off 'peel and steal' attacks this product has been tested independently increasing resistance by up to 300%. It is perfect for multi-drop couriers and other applications where the driver might forget to lock the vehicle door. Hook Deadlock A hook deadlock can be installed on the door of a vehicle. It functions indep