Dynaflex's Powerball Gyro Exercisers generate up to 30 lbs of resistance at 13,000 RPM's.
Comes with a starter string, grip ring and a training CD.
The Dynaflex Pro has exactly the same features as the Powerball except without the lights.
Powerball gets going easily with the flick of a thumb or a quick pull of its starter cord.
* Rotate your wrist to make the balanced rotor spin faster and
faster, up to 13,000 rpm.
* Its 30 lbs. of gyroscopic force creates progressive resistance.
* Improves coordination while building strength in your fingers, hand,
wrist, arm and shoulder.
* Builds incredible grip strength for discgolf, golf, tennis, baseball,
hockey, bowling, rock climbing, cycling, mountain biking,
motocross, fencing, canoeing, kayaking...