Winner Space Wincspace Wrist Trainer Powerball Arm Strengthener Essential Gyroscopic Wrist and Forearm Exerciser Ball

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Product Features

Strengthen fingers, wrists, hands, forearms, shoulders and bicep etc., and also be beneficial in promoting co-ordination and blood circulation. Rehabilitates sore muscles and joint, great for musicians, guitarists, pianists, drummers. Small, compact and transportable, you can take anywhere. Simple to start with a pull-string.And the ball with flashing LED All you need do is to increase the speed by making a rotational wrist movement and to keep in sync with the spinning of the ball. The faster you spin the harder your muscles work.

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