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Have you ever meet with the situation that you need a crosss head screw bolt,but you only have a flat one? Have you ever spent time on exchanging screw driver’s head? This is a frustrating task. The multifunctional screwdriver aims to solve this problem. When user pushes the button on the multi-function screw driver, it can easily convert between the cross head and the flat head, which can improve the efficiency and simplify people's lives.