Features： 1、Palm Massaging: Hand squeeze ball adopted multiple convex point design, provide 3D hand and palm massaging, activate acupoints and relieve fatigue. 2、Health Care: Hand strength exercise ball with a size, suitable for your palm, which can stimulate acupoints to reduce disease and promote health. 3、Stimulate Acupuncture: Hand exercise ball fully covered with soft thorns on the surfaces, good for stimulating your hands while exercising your grip strength. 4、Widely Use: Grip strength trainer ball is suitable for hand spasm, arthritis, and stroke, which is a stress ball for mobile phone and computer enthusiasts. 5、Soft TPR: Hand grip training ball made of high quality TPR material, odorless, soft and comfortable, no easy to break, which can be used for a long time. Specification： Item Type: Hand Grip Ball Material: TPR Function: Build finger and arm strength. With size, suitable for your hand. Applicable people: 1. Hand extensor hallucis longus and finger extensors healthy exercise, prevention and correction of contracture stiffness. 2. Carpal extensor muscle and finger extensor muscle paralysis (radial nerve paralysis). 3. The dysfunction of fingers and wrists of patients with hemiplegia, and the weakness of fingers and wrists, improve the muscle strength and joint activities of relevant parts through training. 4. Control the increase of flexor muscle tension and atrophy of thenar. 5. Prevent finger flexion and spasm, prevent finger joint deformation and deformity. 6. Correct the fingers while assisting in training the flexibility of the fingers. Package List： 1 x Hand Grip Ball