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Van Security Hook Locks Van security hook locks offer an additional layer of security from theft. They function independently of the manufacturer's lock system and are operated with the highest-security key. They're a great way to protect yourself against door-peeling burglaries, since they hook onto the receiver bracket, making it difficult to force to open. These can be installed on the rear and side door of the majority of vans. They are a mechanical form of deadlock. Van Security hook locks are the newest technological advancement in van safety