Features: 1Made of durable high?elastic materials, and it is flexible, suitable for all ages. 2The grip ball is small, can be put it in pocket and carry around, you can take it out to kill time when riding in the car. 3Exercise palm muscles and finger flexibility, suitable for primary strength training and rehabilitation training. 4You can press your fingers, activate joints, and exercise your fingers and arms. 5Suitable for people who learn to play the piano and exercise finger strength, and those who use keyboard and mouse for a long time. Condition:100% Brand New Item Type: Hand Grip Ball Material: Silicone Size: Approx. 5 x 4.5cm / 2 x 1.8in Features: 1. Rehabilitation training 2. Exercise knuckles and palm muscles 3. Press the fingers and activate the joints 4. Exercise finger and arm strength. Instructions: The grip ball is not big, just hold it in the palm of your hand, hold the grip ball, pinch it hard, you can feel the pressure of the grip ball on your fingers. Generally, if you continue to hold it for N times, you will feel numbness and heat in your palms, and then you will feel comfortable. Because when you squeeze the force ball hard, the flexible ball deforms and fills the palm. As the palm becomes loose and tight, the ball can effectively stimulate the major acupuncture points of the palm, promote blood circulation, and achieve the effect of exercise and health care. Basic Exercises: Hold the grip ball completely in your palm, and do hand stretching exercises ten times, first with the right hand and then with the left hand, alternately. For people: 1. Rock climbers and bodybuilders train finger and grip strength 2. Lovers of badminton, table tennis, basketball and other ball sports 3. Learn to play the piano and exercise finger strength 4. For people who use the computer keyboard and operate the mouse for a long time Cleaning: In order to extend the service life of the silicone grip ball, it is recommended to wash it gently with water. Package included:5 x&nbspHand&nbspGrip&nbspBall