Gripmaster is the original, patented hand exerciser with individual power buttons. Many imitators have appeared, and these products do not have the engineering and quality which goes into every Gripmaster hand exerciser. Beware of inferior quality imitation products from Asia. Gripmaster is the very best hand exerciser 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. With Gripmaster you can exercise each finger individually, or the entire hand. Use each button independently to exercise fingers or compress the entire unit for complete hand and forearm strengthening. By isolating each digit, stronger fingers can’t compensate for the weaker ones. Allowing the user to isolate and exercise each finger individually for strength, dexterity, and endurance. Helping to develop outstanding hand, wrist and forearm strength. Gripmaster is ideal for anyone wanting to develop and maintain strong healthy hands. May help with arthritis, carpal tunnel, neuropathy, and poor circulation. Features graduated tension levels, which help the user measure progress.