CanDo® Digi-Flex Hand Exercisers helps users to exercise their fingers independently to develop strength, flexibility and coordination as well as hand and forearm strength. Great choice for finger/hand rehabilitation. It can be held in one hand and used by pushing each button independently to exercise fingers or pressing down the whole unit for entire hand and forearm strength training. The Hand Exercisers are ergonomically designed in a way that Stronger fingers cannot compensate for weaker ones. Eight different resistance levels available, each level in different color, which makes it easy to identify. Choose in model option. Illustrated manual is included.