https://squareblogs.net/second....carol31/youll-never-
What is a Hook Lock Van? A hook lock van is an electronic version of deadlock that operates independently of the locking system of your manufacturer that is fitted to the door and connecting panel using hook-style bolts that hooks into a receiving bracket providing security of the highest quality. These locks can be that are keyed identically to your other van locks, meaning you only require one key to unlock your entire set. They can also be fitted with lock shields to guard the cylinder