Features： 1、Multiple convex point design, activate acupoints, massage the palm and relieve fatigue. 2、Two finger design is not easy to fall, can be divided into finger practice and avoid falling off. 3、Soft and comfortable, the surface is fully covered with soft thorns, good for stimulating and exercising the hands. 4、Correct the fingers at the same time to assist the training of the dexterity of the fingers. 5、Suitable for dysfunction of fingers and wrists in patients with hemiplegia, weakness of fingers and wrists. Specification： Item Type: Hand Grip Ball Material: TPR Size: Approx. 10 x 8cm / 3.94 x 3.15in Function: Grip the ball to relieve pressure and vent feelings 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