Functional features: grip ball, grip ball, also known as decompression ball, vent ball, is a popular fitness ball in Europe and the United States. It is made of durable high-elastic materials, mainly round and egg-shaped, flexible and suitable for all ages. It can exercise the strength of palm muscles and the flexibility of fingers. It is suitable for primary strength training and rehabilitation training. Functions: exercise fingers,Arm strength. The size of 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 hold it continuously for N times, you can feel numbness and fever in the palm, and then you will feel very comfortable. Because when you pinch the ball hard, the flexible ball is deformed and filled with the palm, and 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 health care. Because the size of the grip ball is small, it can be carried in the pocket, and it can also be taken out to kill time when taking trains and cars. So it is more suitable for people who often work with their fingers and often go out. Basic exercise: Hold the grip ball completely in the palm of your hand. Do ten hand stretching exercises. Do the right hand exercises first and then the left hand exercises alternately. Applicable population Rock climbers and bodybuilders train finger strength and grip strength. Fans of badminton, table tennis, basketball and other ball games; Learn to play the piano to exercise finger strength; For people who use computer keyboard and mouse for a long time. Product property: 12/set Material: environmentally friendly and tasteless PVC Weight: 50g Product size: massage ball 7.5cm Peanut ball 7.5 * 16 cm Color: Orange Blue Yellow Mint Green Red Green Suitable age: children/adults/the elderly, suitable parts: hands, feet, neck, shoulders, arms, back, waist, etc.