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Van Security Locks Van security locks can help you save money on insurance premiums and also deter thieves. Slam locks are designed to fit on van doors and lock it automatically when closed. They are an excellent option for same-day couriers or delivery drivers with multiple drop locations. Statement locks are a more visible security measure, and are attached to the exterior of the door they connect the edge of the door to the bodywork, preventing the door from being bent to gain entry