WB-386LC spain ball

-- Plastic case,perfect exercise gadget for sports like golf,tennis,squash,cricket.badminton,baseball,bowling,basket-ball,motocross,mountain climbing. -- Increases strength in fingers,wrists,hands,forearms,biceps,triceps,ligament and shoulders. -- Great benefit and avoid the libament injuries who are the typists,musicians,guitarists,pianists,drummers. -The balance of the rotor has been corrected by computer,so the ball has very excellent stability. - There is a circle of silicone rubber on the surface of the ball,That can prevent the ball from sliding down to the groud,and the feeling of grasping is also better; - The plastic material is especially durable. - The axle is made of steel,not iron,it is not easy to be broken.