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Is a Van Hook Lock Worth the Investment? A van hook lock can be an effective method to increase the security of your vehicle. It is attached to a door or connecting panel, they function independently of the manufacturer's locking mechanism and can only be operated using a key under full control of the driver. These deadlocks are different from straight bolt deadlocks in that they lock using a hook bolt that catches in the receiver keep. This gives you superior vehicle security. High-Security Loc