QMWWMQ 1Pcs Hand Exerciser, Finger Exerciser (Hand Grip Strengthener), Spring-Loaded, Finger-Piston System, Added Palm Cushion

THE ORIGINAL SPRING-LOADED HAND & FINGER EXERCISER: Prohands is used by professional athletes, world-class musicians, and as a rehabilitation tool. Made from high-quality components ABS plastic, stainless steel springs and santoprene. REHABILITATION & PREVENTION (STRONGER, HEALTHY HANDS): Ideal for anyone wanting to develop and maintain strong healthy hands. THE PROHANDS FAMILY OF HAND EXERCISERS (2ND IMAGE): VIA is our entry-level model, GRIPMASTER is our signature model, GRIPMASTER-Rehab has an added palm cushion, and PRO is our most advanced model for pros and motivated individuals. VARIOUS TENSION LEVELS: Graduated tension levels help the user measure progress. VIA 1lb to 6lb, GRIPMASTER 1lb to 9lb, GRIPMASTER-Rehab 0.75lb to 9lb, PRO 5lb to 13lb. By isolating each digit, stronger fingers can’t compensate for the weaker ones.