This is a kind of small fitness equipment to exercise wrist and arm strength.Strength range: 5 - 60kg. It is easily adjust the intensity according to your exercise intensity. Fit Anyone: The simple and convenient design makes it a perfect training accessory for everyone who wants to exercise, like teens, adults and even seniors who want to maintain their hand grip. The handle 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. High-quality spring steel is chosen during the production process, which is resistant to high temperatures, rigidity and long service life. Hand grip is easy to pop into your pocket or backpack, allow you exercise your hand anywhere and anytime, whatever at home, gym, office, or when you take a walk, watch TV, outdoors and travel. Great for improving grip strength, hand endurance, dexterity, muscular tone and fine and gross motor skills.The handle length is suitable, the grip feels comfortable, let you each finger can get the exercise.