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Strengthen fingers, wrists, hands, forearms, shoulders and bicep etc., and is also beneficial in promoting coordination and blood circulation.
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Rehabilitates sore muscles and joints, great for musicians.
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Small, compact and transportable, you can take it anywhere. Simple to start with just a pull-string.
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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.
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The faster you spin the harder your muscles work!
