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Van Hook Deadlocks Van hook deadlocks operate independently of the vehicle's factory lock system. They have hook-style bolts that lock onto a receiving bracket. This makes it more difficult to get into. They are especially useful in helping to prevent "Peel and Steal". They also stop criminals from removing your catalytic convertor that converts harmful pollutants into safer gases. Hook Locks Van hook deadlocks can be operated by a key, and function independently of the lock from the manufacturer. This gives you an additional layer of security. These