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Why Buy a Hook Lock For Van? A hook lock for your van is an excellent investment to increase your vehicle's security. These mechanical locks are installed on your bodywork and doors. They work by throwing a hook-style bolt into a receiver when operated by an outside key. These locks are great for tradesmen and couriers who leave their vehicles unlocked in between deliveries. Other kinds of locks are available - deadlocks and slamlocks. Durability Van owners should look for ways to protect themselves from their businesses in an ag