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Van Hook Deadlocks Van hook deadlocks function independently of the vehicle's factory lock system. feature a hook-style bolt that latches onto an receiving bracket. This makes it more difficult to break in. They are especially useful in stopping "Peel and Steal". They also prevent criminals from taking away your catalytic converter which converts harmful pollutants into less harmful gasses. Hook Locks Van hook deadlocks function independently of the manufacturer lock and can be operated with a key to give