specification: Item Type: Hand Grip Ball_x000D_Material: TPR_x000D_Function: Build finger and arm strength. With perfect size, suitable for your hand. _x000D__x000D_Applicable people:_x000D_1. Hand extensor hallucis longus and finger extensors healthy exercise, prevention and correction of contracture stiffness._x000D_2. Carpal extensor muscle and finger extensor muscle paralysis (radial nerve paralysis)._x000D_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._x000D_4. Control the increase of flexor muscle tension and atrophy of thenar._x000D_5. Prevent finger flexion and spasm, prevent finger joint deformation and deformity._x000D_6. Correct the fingers while assisting in training the flexibility of the fingers. Features: 1Palm Massaging: Hand squeeze ball adopted multiple convex point design, provide 3D hand and palm massaging, activate acupoints and relieve fatigue. 2Health Care: Hand strength exercise ball with a perfect size, suitable for your palm, which can stimulate acupoints to reduce disease and promote health. 3Stimulate Acupuncture: Hand exercise ball fully covered with soft thorns on the surfaces, good for stimulating your hands while exercising your grip strength. 4Widely Use: Grip strength trainer ball is suitable for hand spasm, arthritis, and stroke, which is a stress ball for mobile phone and computer enthusiasts. 5Soft 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. PackageList: 1 x Hand Grip Ball