The CanDo Wrist/Forearm Exerciser allows the practice of repetitive functional movement to rehabilitate the wrists and forearms. Use it to practice exercises such as flexion, extension, pronation, supination, as well as ulnar and radial deviation in the hand and wrist. It is perfect for patients just beginning rehabilitation because of how little physical strength is needed to be used. The handle is meant to be used with a CanDo semi-sphere for the complete range of motion experience. Grab a handle that fits your hand and screw it into your desired semi-sphere. This extra large handle comes yellow in color and is sold individually.