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We dare you to try to hold this ball for more than a minute! Used by doctors & therapists worldwide!DynaFlex Pro Gryo gyroscopic exerciser with docking station is an easy and effective way to strengthen your grip and improve coordination without strenuous exercise!
Here's a proven tool in the prevention and elimination of carpal tunnel syndrom, arthritis, tendonitis, tennis elbow & other repetitive stress injuries. Just place it in the battery-powered docking station to get the ball spinning. Then pick it up & you can quickly work it to reach speeds in excess of 15,000 RPMs. As it spins, it creates a gyroscopic pull that strengthens your grip and forearm, relieves stress and more. Docking station serves as a base when it's not in use. Requires 2 'AA' batteries. Limited lifetime warranty.