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L4V Hook Deadlocks L4V hook deadlocks are an upgrade for side and rear van doors as well as tailgates and doors for cabs. They are independent of the locking system of the manufacturer and secured by a high security key. This product, created 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 other applications where the driver is unable to lock the car door. Hook Deadlock A hook deadlock can be put o