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L4V Hook Deadlocks L4V hook-deadlocks make a great upgrade for back and side van doors and tailgates or doors for cabs. They operate independently of the locking system and are secured with a high-security key. This product, created to stop 'peel and steal' attacks It has been tested by an independent lab and can boost the resistance to attacks by as much as 300%. It is perfect for multi-drop couriers as well as app