for athletes and musicians. Provides a complete strength training solution for fingers, hands, wrists, and fore . s finger strength, flexibility, coordination and speed. golf training aid to help golfers improve hand strength.The Hand Exerciser offers resistance adjustable from 3.0 - 8.5 lb on each finger, thereby allowing a single unit to meet all of your exercise needs. The innovative 5-button design allows extension finger exercises, critical for piano and guitar players.With 2 brackets, can lock 2 buttons simultaneously, any two of the buttons can be held down. choose whatever fingers you want to exercise at your will.Soft button cap makes it comfortable to press. The size makes you hold it all in one palm and make it portable to exercise your fingers in anytime at anywhere. core, adjustable tension, make operation smooth and accurate.