Check the listing for details. Rolyan Basic Ergonomic Hand Exerciser, Strengthening Device for Fingers,.... Condition: New. Listed at 27.30 USD. Rolyan Basic Ergonomic Hand Exerciser, Strengthening Device for Fingers, Hands, and Thumbs, Comes with 4 Pairs of Graded Rubber Bands with Progressive Difficulty, Blue Product Details Ideal exerciser for individuals who require rehabilitation or therapy for their hands and fingers to improve weak grip and build muscle Lightweight frame uses a sliding clip to block flexion and extension during exercises, making it idea for thumb and finger strengthening Features the ability to switch out rubber bands of progressive resistance and includes adjustable setting to fit most hand sizes Comes with four pairs of rubber bands, two of each resistance level - extra light yellow, light red, medium green and heavy blue Latex free