Cando digi-squeeze hand exerciser, small, 5-piece set cando digi-squeeze hand exerciser is a hand-held foam exercise ball for squeezing that helps develops isolated finger strength, flexibility, and coordination for rehabilitation of carpel tunnel, arthritis, stroke, fractures, tendon injury, nerve lacerations, tennis elbow and more. The ball comes with exercise pamphlet and is available in three different sizes for small, medium, and large hands, and 5 different resistances. Each ball has finger and thumb positioning indents and markings for both left and right handed use. Small – set of 5 pieces: yellow, red, green, blue & black. rack not included.