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Automatic start design, need to push the core in the direction of the arrow, start by the internal spring, very easy and convenient. When it rotates,
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Benefits of the wrist ball 1. Wrist ball is good for warming up your hands, wrists, shoulders, forearms, biceps and upper limbs 2. If you use the computer or play the piano for a long time, you can play this ball for a few minutes every day, which will make your hands feel less painful 3.
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Exercise Gyro Ball for Wrists and Forearms
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JIN BD Wrist Trainer/Strengthener Gyro Ball Auto-Start Gyroscopic Forearm Exerciser for Strengthen Arms, Fingers
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