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Why You Should Install a Hook Lock A hook lock will prevent thieves from taking the contents of your van by latching on to the door of your vehicle. They also decrease the chance of workplace accidents caused by faulty spring latches on regular sling hooks that fail to close when not in use. This paper makes use of bifurcation and numerical continuation theories to analyze the motion characteristics of a specific type of hook lock mechanism. The influence of the weight of the landing gear and the spring's locking para