Prohands Gripmaster Hand Exerciser, Finger Exerciser (Hand Grip Strengthener), Spring-Loaded, Finger-Piston System, Isolate and Exercise Each Finger, (1.5 lb XX-Light Tension, Green-Gripmaster)
The patented Gripmaster is the only hand exerciser in the world that exercises each finger individually for optimum conditioning of the hand, wrist and forearm.