Gyro Ball Arm Exerciser Strengthener - Not sold in stores

Strengthening your Grips, Wrists, and Forearms Begins HERE! Durable material, environmental, tough and harmless. Steel axis, not easy to deform and break. Lightweight and portable, you can exercise whenever and wherever possible. Suitable for those who need wrist training, such as sportsman, computer typist and pianist. How to use: 1 Holding the wrist ball with one hand, the opening part of the upward, the other hand will be the head of the rope into the hole in the center of the ball. 2 With the thumb of the hand holding the ball, turn the ball forward, the rope tightly wrapped around the center of the ball in the center groove. 3 When the rope around the center of the ball half a circle, stop turning the ball center. Use one hand to hold the ball, the other hand to pull out the rope quickly and let the ball center rotate at the fastest speed. 4 Immediately open the part down, with the wrist part of the ball, until you can feel the speed of the ball can continue to accelerate.

【UPGRADE】On the gyro ball, increase the size and add tow handles, With the arm ball, you can build high-intensity upper-body muscles, fat-burning, and

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【Self-starting design】The movement in the ball comes with a spring starting device, no power supply and no rope. Gently press the inner ball with both

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♥ Exercise your wrists and hands. The hand enhancement ball is the centrifugal force generated by the interaction between the rotation of the wrist

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【AUTO START】This new model start with internal pre-tensioner,no starter cords required.Just push to the inner ball and move your thumbs along the

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