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L4V Hook Deadlocks L4V hook-deadlocks are an excellent upgrade for side and back van doors and tailgates or doors for cabs. They operate independently of the locking system and are secured with high-security keys. Designed specifically to combat attacks using 'peel and take' this product has been tested by an independent lab increasing the resistance to 300 percent. It is perfect for couriers with multiple drops or in situations where the driver may forget to lock the door of their