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L4V Hook Deadlocks L4V hook deadlocks are an upgrade to front and side van doors, as well as tailgates and doors for cabs. They function independently of the manufacturers locking system and are secured by a a high-security key. Designed specifically to combat attacks of 'peel and steal' this product has been independently tested increasing resistance by up to 300%. It is ideal for multi-drop couriers as well as applications where the driver might forget to lock the car door. Hook Deadl