To solve a problem wherein a user gets tired when rotating a conventional driver for a screw as it is, and the user is easy to get tired since muscles used when rotating the driver are almost muscles of fingers of a hand and are small and limited, and the user has to hold and rotate the driver by the hand for rotating the driver when rotating the driver, the user has to rotate the driver by grasping a head part of the driver by the fingers as the above to simultaneously hold and rotate the driver, and efficiency is not good since larger muscles such as force of the hand cannot be used.

When the head is used by fixing the head in the palm of the hand, the driver can be pressed and held and the driver can be rotated, if the main body under the head has a structure to idle. The finger force for holding the driver therefore is not required. The driver can be also rotated by one hand. When the main body is formed into a shape like an impeller to make the finger easy to put on, rotation using muscles of the whole of the hand instead of grasping rotation is made possible. As a result, fatigue of the muscles can be reduced.