5pcs Elastic Hand Grip Ball Star Shape Wrist Finger Strength Training Exercise BallGreen 35 Degree Condition: Item Type: Grip Ball Material: Silicone  Function:  1. Rehabilitation training 2. Activities calcined knuckles, palm muscles 3. Pressure finger, activating joint 4. Build finger and arm strength Usage: The size of the grip ball is not large, just in the palm of the hand, hold the ball and hard pinch, you can feel the pressure of the grip ball brought to the fingers.Generally continue to hold many times, you can feel the palm numbness and fever, and then it is very comfortable feeling. Because when pinching the ball, the flexible ball is deformed and filled with the palm, the palm is loose and tight, the ball can effectively stimulate the major acupoints of the palm, promote blood circulation, and achieve the effect of exercise and healthy care. Basic Exercise: Hold the ball completely in the palm of your hand and do ten times hand stretching exercises, first with your right hand and then with your left hand, alternating. Applicable population: 1. Climbers and bodybuilders training finger strength and grip strength 2. Fans of badminton, table tennis, basketball and other ball games 3. Learn to play the piano to exercise finger strength 4. People use computer keyboard and mouse for a long time Cleaning: In order to extend the service life of the silicone grip ball, it is recommended to gently wash with water