he D'Addario Dynaflex builds and conditions hands, wrists, and forearms while also increasing hand speed and endurance. Simply start the rotation and then with a rocking motion, build up the gyroscopic speed and feel the burn. The Dynaflex allows you to achieve the competitive edge no matter what instrument you play.
 

D'Addario D'Addario Dynaflex Gyro Hand Exerciser

$36.99Price