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Is a Van Hook Lock Worth the Investment? A van hook lock is an effective way to improve the security of your van. Attached to an opening or connecting panel they work independently from the manufacturers locking mechanism and can be operated with keys under the full control of the driver. These deadlocks differ from straight bolt deadlocks in that they lock using a hook-style bolt that is snared in the receiver keep. This provides the highest level of security for your vehicle. High-Security Lock