Daddario Accessories Hand Exerciser-Improve Dexterity And Strength In Fingers, Hands, Forearms- Adjust Tension Per Finger- Simulated Strings Help Develop Calluses- Comfortable ConditioningDAddarioPlanet Waves VarigripDesigned with the musician in mind, the DAddario Planet Waves Varigrip is an adjustable tension hand exerciser that helps improve dex..