Hand/Finger Strengthener Musical Instruments (Blue, 5 Pounds)

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THE ORIGINAL SPRING LOADED HAND AND FINGER EXERCISER - Used by professional athletes, world class musicians and as a rehabilitation tool. Made with high quality ABS plastic components, stainless steel springs and approved santoprene.
STRENGTH, POWER AND ENDURANCE FOR ATHLETES: Exercise each finger individually or the whole hand. Isolate and exercise each finger individually for strength, dexterity and endurance. Develops excellent strength in the hand, wrist, and forearm.
MULTIPLE TENSION LEVELS: Graduated tension levels help the user gauge progress. VIA 1-6lbs, GRIPMASTER 1-9lbs, GRIPMASTER-Rehab 0.75-9lbs, PRO 5-13lbs. By isolating each finger, stronger fingers cannot compensate for weaker ones.