Abstract: The present invention relates to a screw driver gun, in particular a driver bit sleeve of the screw driver gun includes an adjoining hole connecting to a polygonal concavity, which is formed on the free end of the driver bit sleeve; a driver device is disposed in the sleeve and comprises a driver bit penetrating through the hole and a spring on the back thereof; the driver bit can rotate with the driver bit sleeve at the same time. While in use, the polygonal concavity can exactly fit with the polygonal screw head by the driver tip of the driver bit driving into the screw recess to synchronize the screw rotating with the driver bit sleeve, thereby reducing the problem of inaccurate driving, transmitting a force equally toward the screw head, and increasing the screwing efficiency.

Abstract: The present invention discloses a screw strip having a rectangular strip, a plurality of receiving sleeves extending from the strip, and a plurality of advancing notches disposed on both sides of the rectangular strip. Each of advancing notches forms a closed state by a blocking of a side piece, thereby reducing the manufacturing cost. The screw strip is fixed firmly by the blocking of the side piece and can avoid sliding out of place or being deformed when screws are being pushed out.