... powered by rotating the wrist. The faster we rotate the ball, the stronger the dynamic and torsion is produced. The speed ... for sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.2. Increases strength in fingers, wrists, hands ... of silicone rubber on the surface of the ball. That can prevent the ball from sliding down to the ground, and ...