Description
1. Material: plastic
2. The right size is within your grasp
3. The axis is stable, and the high-speed rotation does not shake
4. The bearing friction coefficient is small, and the rotation is longer
5. Round and smooth, no burr on the edge, no hand injury
6. A variety of forms, deform at will, and rotate at high speed
7. Helps relieve stress and exercise thinking and hands-on ability
