They have many benefits for the hands, wrists and arms being able to increase muscle strength and definition. NSD Powerball is a revolutionary new Gyroscope which literally explodes with mind numbing inertial forces once you activate its internal rotor! When the Powerball is a handheld gyroscope device that is rapidly spreading across the world into the hands of the young and old alike! It’s a baseball sized handheld device that can be used in a rehabilitation manner for arm and wrist injuries or to help with Golf, Baseball, Tennis, Hockey or Squash building arm strength and in such sports as climbing, rowing, mountain biking or motocross working fingers, hands, wrists, forearms and shoulders. It can be used as rehabilitation devices and help with repetitive strain injury for the young to the old. The Powerball (or hand held gyroscope) is a truly dynamic object, there are no batteries and no electricity used, unless you have a model with a rpm counter. The speed of the device is grooved near the axle, so with an externally applied force, the axle will push

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