WB-586 Metal Power ball

WB-586 Metal Power ball,with or w/o speedometer Dynamic: There is no any battery or electricity inside the device, It is application by centrifugal force & inertia like a gyroscope. It is powered by rotating the wrist. The faster we rotate the ball, the stronger the dynamic and torsion is produced. The speed of rotation can reach over 12,000 RPM.Function:1.Perfect exercise gadget for sports like golf, tennis, squash, cricket, badminton, baseball, bowling, basket-ball,, motocross, mountain climbing.2.Increases strength in fingers, wrists, hands, forearms, biceps, triceps, ligament and shoulders3.Great benefit and avoid the ligament injuries who are the typists, musicians, guitarists, pianists, drummers, 4. It can make the hurt hand return to original condition by degrees and rehabilitates sore muscles and joints.5. it can make the circulation of the blood better in a short time,Merits:1) It is a small ball, which can make people achieve sporting effects in a very short time.2) Almost everyone can play it, no matter the old, adults, orteenagers.3) No time or location limits. It can be used at any time and inany place while chatting, watching TV, going outing and mountainclimbing, and taking a bus.Features:1) The balance of the rotor has been corrected by computer, so theball has very excellent stability.2) There is a circle of silicone rubber on the surface of the ball.That can prevent the ball from sliding down to the ground, andthe feeling of grasping is also better.3) Themetal shellis especially durable4) The axle is made of steel, not iron. It is not easy to be broken