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Operation manual-steps to: If you don?t know how to shrink the tool: In fact, the operation is very simple: 1: Hit the head of the product vertically on the ground without worrying about damaging the product. 2: Do not knock the shrink tool on books or other soft objects, but on hard ground or objects. 3: If the second part is stuck, don't continue hitting it, you should stretch it out and then retract it. 4: If you are not proficient in contraction tools, you can practice more and you will be proficient in techniques and methods.