| 摘要 |
The present invention relates to a driver having a screw supporting surface, which is capable of definitely preventing a slight movement or vibration of a screw upon fastening the screw by gripping a head portion of the screw very reliably. The driver having a screw supporting surface includes a shaft formed on one end, the shaft having a tip coupled to a head groove of a screw. A basis portion of the tip is integrated with an end of the shaft. The outer diameter of the basis portion of the tip is formed to be smaller than the outer diameter of the shaft. Supporting surfaces being in contact with the head portion of the screw is formed around the basis portion of the tip. The supporting surfaces are formed to be flat towards the outer peripheral surface of the shaft from the basis portion of the tip. |
