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How to Secure Your Van With Hook Locks Lock merchandise on display hooks easily, without affecting the layout of the store. These mechanical locks protect against theft by stopping huge quantities of merchandise being taken away at a time. Hook locks, unlike deadlocks feature a locking system that closes after a load is secured to stop the lock from being opened. They're a cost-effective security option for any vehicle and can be fitted to most vehicle manufacturers including Citroen, Peugeot and Ford