A good choice for athletes (climbing enthusiasts, fitness, tennis, baseball, boxing, tennis, golf, and shooting) and musicians (guitarists, bassists, pianists, and violinists). It can also be used by computer users. It is an auxiliary device for rehabilitating patients with hand muscles or soft tissue contours. The hand gripper can alleviate fatigue, strengthen the practitioner's muscles, promote blood circulation, maintain blood circulation to the joints, and prevent inflammation. Our adjustable hand grip uses thermo-plastic rubber material, which belongs to environmentally friendly rubber, it has good wear resistance, skid resistance, and shock absorption and will not hurt the hand. Designed with adjustable resistance from 11-132lbs, the hand grip strengthener is effective to develop dexterity of fingers hands wrist, and forearm by increasing or decreasing the tension. 10*15 cm, 0.15 kg, easy to pop into your pocket or backpack, allow you to exercise your hand anywhere and anytime, whatever at home, gym, office, or when you take a walk, watch TV, outdoor and travel.