To provide a screwdriver permanently stationed in a coin purse to be always portable.

In this screwdriver, the diameter of the gripping part is made to have the same length as that of a coin, as shown in a Fig. 2. In the screwdriver, a function of a multi-function tool is also added. Since the screwdriver is always portable, a time for going to take the screwdriver can be saved. The diameter of the screwdriver is the same as that of the coin, and thereby the screwdriver can be permanently stationed in the coin purse. The screwdriver has a circular external shape to prevent clothing fabric and others from being damaged.