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How to Secure Your Van With Hook Locks Easily lock merchandise on display hooks without disrupting the layout of the store. These mechanical locks prevent theft by preventing huge quantities of merchandise being taken away at a time. In contrast to deadlocks unlike deadlocks, hook locks have an locking mechanism that snaps shut when a load is secured to stop it from being opened. They are a cost-effective method to improve the security of any van. They can be fitted by most vehicle manufacturers such as Citroen Peugeot and Ford. Cost If you're