The D'Addario Dexterity Band Hand & Finger Exerciser is the perfect solution for warming up and conditioning your fingers. Use with or without your instrument to improve your overall speed, dexterity, and strength. Squeeze the top and bottom of the ring and slip mid way down your fingers for additional resistance so you can run through any of your favorite scales or exercises to get the perfect playing workout. One size fits all. Tone and train idle hands anytime, anywhere. Keep your strength and dexterity at its peak, with a highly effective tool that’s tough to put down. Perfect tool for pre-show warm-ups and maintaining conditioning. Develops and maintains the strength and dexterity of your fingers, hands, and forearms. Increases finger speed and fluidity. Use with or without your instrument, at home or on-the go. Quality finger exerciser, great for guitarists, bassists, and other instrumentalists