The Finger Exerciser Is Abs With Fine Machining,It Is Very Sturdy And To Use. 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. 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. Adjustable Tension: The Tension Of Each Finger Is Adjustable,You Can Choose Relevant Tension According To Your Different Needs. 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.