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Van Hook Deadlocks Van hook deadlocks function independently from the vehicle's factory lock system. They have hook-like bolts that attach onto the receiving bracket. This makes it harder to open. They are particularly useful in stopping "Peel and steal". They also stop criminals from taking away your catalytic converter which converts harmful pollutants into less harmful gasses. Hook Locks Van hook deadlocks are operated by a key and operate independently of the lock that