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- Designed to improve the wrist muscles, simply set the inner section spinning, rhythmic circular hand and wrist movements not only maintain the rotation, but also make it steadily faster. Increased in centrifugal forces make it harder to keep hold adding resistance to your wrist thus making you stronger.
Extra Information Full PowerBall repair or replace warranty
Digital display is not included but may be added to this ball at a later stagePowerball Original 250Hz Amber Reviews
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