DFX™ Powerball Sports Pro Gyro Ball Exerciser

Therapeutic for hands, wrists, arms, biceps & triceps with its high performance design The gyroscopic exerciser is a fine precision instrument capable of speeds over 13,500 RPM. DFX™ provides a relaxing and extremely effective way to strengthen your grip, wrist, forearm and biceps, as well as improving coordination without strenuous exercise.