Cando Digi-Flex Exercisers aid in developing finger strength, flexibility, and coordination. Use for rehabilitation of carpal tunnel, arthritis, stroke, fractures, and more. Digi-Flex exercisers allow users to exercise fingers individually or simultaneously for hand and forearm strengthening. Set includes extra light (yellow), light (red), medium (green), heavy (blue), and extra heavy (black) exercisers. Available with plastic or metal display. Exercise pamphlet included.