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How to Install Hook Locks For Vans There are a variety of ways to improve the security of your vehicle. Installing hook locks is one of the most effective methods. These mechanical deadlocks work independently of the factory locks and utilize an extremely strong bolt to connect with a receiver bracket. They provide a higher level of protection against break-ins that occur through peel-back doors. They also act as a visual deterrent to potential thieves. They offer an enhanced level of security