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[screwdriver] for screwing screws to force the tools in place, usually with a thin wedge head, can be inserted into the screw head slot or notch -- also known as the "screwdriver". The main word (minus) and cross (plus) two.

A screwdriver and differentiate traditional screwdriver (English: Screwdriver) and ratchet screwdriver (electric screwdriver) (English: Ratchet screwdriver). The traditional screwdriver is composed of a plastic handle and a lock screw rod, and the ratchet screwdriver is by a plastic handle and a ratchet mechanism. The latter that lock screw rod can be clockwise or counterclockwise spin, by idle function to promote the efficiency of locking screws, without successive power drive (hand) back to the original position.