| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problems that a conventional grip ball with warts which is often used by a pair eventually becomes unused for being lost one of the pair, and the conventional grip ball does not reach a goal of enhancing fingertips though it does stimulate fountains in fingers.SOLUTION: In a grip ball with warts of the present invention, a pair of the grip balls can be stuck to each other by magnetic force when using two or more of the grip balls by putting therein a magnet and a magnet, and a magnet and an iron ball.</p> |
