CanDo Theraputty Exercise Putty is the standard in resistive hand exercise material. Each color-coded putty has a different consistency ranging from XX-soft for strengthening the weakest grasp to firm for developing a stronger grip. It is available in convenient, easy-to-open plastic containers (2, 3, 4, and 6 ounce) for individual patients to use at home as well as a choice of larger containers (1 and 5 pound) for hospital or clinic use.