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Van Hook Deadlocks A van hook deadlock can be put in your vehicle. They can be difficult to operate, making them a useful deterrent to criminals. They require a key in order to operate. These locks are great for those who live in areas with high crime rates but do not have access to off-street parking. A locksmith can install these locks in one or two hours. They are more secure than slam locks. With all the security options available it can be a challenge to decide which one is best for your vehicle. Slam locks and deadlocks