... unique design!Introduction of Hand and Finger Grip Exerciser ENO EHF-01 :The Hand and Finger Grip Exerciser is ... the button down, keep the gesture for 3-5 second, then relax, repeat this practice for 5-10 ... comfortable while practice, avoid fatigue and pain of hand.B. The resistant levels could be adjusted freely, ... strengthen palm, finger, wrists and other area of hand. D. Should any of our items meet ...