wrist ball with massage and lights * Durable PC case and metal ball core * Silicon strap * Customer color available * Dynamic:There is no ... .Function:1.Perfect exercise gadget for sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.2. Increases ... steel, not iron. It is not easy to be broken Wrist Ball with massage and lights- WB286L