Patent ID: 8561507

Claim:
A screwdriver comprising: a front part including a connector disposed on one end thereof and a number of ribs axially extending on another end thereof, between each two ribs being defined a chamber, and each rib includes a sliding projection extending outward from an inner side thereof; a middle part including a central block and a plurality of extending wings extending around the central block, the central block including an orifice, each extending wing including a slot formed on an outer side thereof to slide the sliding projection; a rear part including a cover, a shaft, and a plurality of pegs; a free end of the shaft of the rear part is inserted into the orifice of the middle part, and the pegs Contact with the ribs of the front part; a plurality of seats axially connected between the two extending wings and the two pegs and located at the chamber of the front part, and each seat being moved between a storing position and an operating position by an external force; a number of bits, each including one end to be inserted into the seat when the screwdriver is operated, the seat is moved toward an operating positions so that another end of the seats extends out of the chamber of the front part to take out a desired bit.