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We are often troubled to change screwdriver according to the screw shape. This design overcomes this problem well. The handle of the screwdriver contains a shell and a movable core. When the front of the handle is turned, the core can rise and fall to change the head of screwdriver conveniently. At the same time, it can be used in the dark environment, because it has 4 lights in the front-end that is controlled by the power switch in the tail-end. The battery is located in the handle.