Designed for people with arthritis, partial paralysis, Multiple Sclerosis, CVA, spinal cord injuries or people recovering from hand surgery. Helps improve strength, dexterity and range of motion using isometric and resistive movements while the hand is positioned for optimal functioning. Finger joints can be exercised individually or together. Measures 5-1/2" x 6-1/2" x 7-1/2" and weighs 12 oz. Instruction booklet with illustrations included. Replacement Kit includes five 1/4" rods with caps, two large foam cushions, six small foam cushions, two rubber bands. Made of pure natural rubber.