D’addario PW-DFP-01 Dynaflex Gyroscopic Exerciser Hand/Arm Fitness

This handheld gyroscope builds and conditions hands, wrists, and forearms while also increasing hand speed and endurance. It’s like having a personal musician’s gym in the palm of your hand. Simply start the rotation and then with a rocking motion, build up the gyroscopic speed for a full hand and forearm workout. Great for keeping the playing muscles toned when away from your instrument or for pre-show warm up.