... gadget for sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.2. Increases strength in fingers, ... prevent the ball from sliding down to the ground, and the feeling of grasping is also better.3) The plastic material ... is especially durable4) The axle is made of steel, not iron. It is not easy to be broken Wrist Ball with ...