Description of DynaFlex Pro Gyro Hand Exerciser The patented Dynaflex Pro Gyro exerciser is designed exactly like the Powerball Gyro without the LED lights or the balanced rotor. The Gyro can reach up to 9,000 RPM and creates 25lbs of torque resistance to increase grip strength, increase range of motion, and to condition arm, elbow, and shoulder muscles. Physicians and Therapists all over the world are using the DynaFlex Pro Gyro as a rehabilitation and strength training tool for many of their patients. The gyro exercisers are a proven tool that will help aid in the prevention & elimination of Carpal Tunnel, Arthritis, Tendonitis, Tennis elbow and many other RSI conditions. DynaFlex's Pro gyro is the entry-level gyro and is a great tool for those looking for a simple yet extremely effective rehabilitation, strengthening and training tool. Features: Note: Speed and torque are approximate. DynaFlex does not claim to cure and/or prevent any type of musculoskeletal injuries.