Ergonomic Design: Unique ergonomic design and soft button,allowing you to exercise fingers,wrists and forearms while practicing the correct action for playing musical instruments practice. Build Strength And Dexterity: Develop and maintain strength and dexterity in your fingers,hands and forearms.The over molded finger pads and grip help make your conditioning workouts comfortable. The finger exerciser is ABS with fine machining,it is very sturdy and to use. Widely Used: Suitable for the auxiliary exercise of instrument playing,physical exercise and,training,physical and rock climbing.Great finger practicing tool for guitar and piano. Convenient to Carry: With compact and light design,you can carry it in pocket,bag or instrument case.You can use the finger exerciser to practice without your instrument any timing.