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. Weight: 0.3 lb. Dimensions: 3.2 x 3.2 x 3.2