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 approved santoprene. 
STRENGTH, POWER & ENDURANCE FOR ATHLETES: Exercise each finger individually, or the entire hand. Isolates and exercises each finger individually for strength, dexterity, and endurance. Develops outstanding hand, wrist and forearm strength. 
REHABILITATION & PREVENTION (STRONGER, HEALTHY HANDS): Ideal for anyone wanting to develop and maintain strong healthy hands. May help with arthritis, carpal tunnel, neuropathy, and poor circulation.