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Why Buy a Hook Lock For Van? A hook lock for your van is a great investment to improve your vehicle's security. These mechanical locks are installed on your doors and bodywork. They work by throwing a hook-style bolt into a receiver, which is operated by an outside key. They are ideal for tradespeople and couriers who often leave their vehicles unlocked between deliveries. There are various types of locks that you can consider as well - slam lock and deadlocks. Durability Van owners should consider ways to protect themselves from their busines