WB-386C Wrist ball, gyroball, power ball

THEORYIt is application by centrifugal force & inertia like a gyroscope. Dynamic: There is no any battery or electricity inside the device, it is powered by rotating
the wrist, and the speed of rotation can reach over 12..000R.P.M
Functions: It is a very effective tool to increase the strength of fingers, wrist,and arm. Besides, it can make the circulation of the blood better in a short time,strengthen the ligament of the wrist, and reduce the injuries caused by sports.Effects: 1) It can benefit those who are fond of sports, like badminton, golf, bowling, baseball, basketball, tennis, table tennis, and so on. It can make them more powerful while playing sports.2) It can avoid the typists' and piano players'ligament injuries.3) It can make the hurt hand return to original condition by degrees and prevent the hand from becoming stark.4) People who often use their wrists to work need to play it more often to strengthen their wrists.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, or teenagers.3) No time or location limits. It can be used at any time and in any place while chatting, watching TV, going outing and mountain climbing, and taking a bus.Features:1) The balance of the rotor has been corrected by computer, so the ball 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, and the feeling of grasping is also better.3) The plastic material is especially durable.4) The axle is made of steel, not iron. It is not easy to be broken