Features 1、Hand extensor long muscles and finger extensors, which prevent and correct stiff contracture. 2、Patients with finger and wrist dysfunction, finger and wrist weakness can improve muscle strength and joint activity through training. 3、It is useful to prevent from the paralysis of extensor and finger extensor muscles (lateral nerve paralysis). 4、Correcting fingers position while assisting in training the flexibility of fingers and other related parts. 5、Control the increase of flexor muscle tension and large fish muscle atrophy. 6、Prevent finger flexion, spasm, prevent finger joint deformation and deformity. Specifications Condition: 100% Brand New Item Type: Grip Ball Color: Purple Length: Approx. 11.2cm / 4.4in Material: High Elastic PU Weight: Approx. 123g / 4.3oz Function: Exercise your fingers and arms. The grip ball is small, you can just hold it in your hand. Hold the grip ball and squeeze hard, you can feel the pressure of the grip ball to the fingers. Generally, if you continue to hold many times, you will feel your hand numbness and fever, and then you will feel very comfortable. Because when you squeeze the grip ball, the flexible ball deforms your hand, and your hand is loose and tight. The ball can effectively stimulate the major points of your hand, promote blood circulation, and achieve the effect of exercise. Features: Because the size of the grip ball is small, you can put it in your pocket and take it with you. You can also take it out while driving a car to kill time. Therefore, it is more suitable for people who often work with their fingers and often go out. Usage: Basic exercises: Hold the grip ball completely in the hand, do ten hand extension exercises, first do the right hand exercises and then the left hand exercises, and practice alternately. Target Users: 1. Hand extensor long muscles and finger extensors are functional exercises to prevent and correct stiffness of contractures. 2. Carpal extensor muscle and finger extensor muscle paralysis (radial nerve paralysis). 3. The dysfunction of fingers and wrists of patients with hemiplegia, 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 large fish muscle atrophy. 5. Prevent finger flexion and spasm, prevent finger joint deformation and deformity. 6. Correct the finger while assisting in training the flexibility of the finger. Package List 1 x Grip Ball