... sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.2. Increases strength in fingers, wrists, hands ... a short time, Advantage: 1) It is a small ball, which can make people achieve sporting effects in a very short time ... circle of silicone rubber on the surface of the ball. That can prevent the ball from sliding down to the ground, and the ...