Adjustable Resistance- Hand Gripper Strengthener The Hand Strengthener features an adjustable resistance range of 22-110 Ibs (10-50kg), allowing you to adjust the resistance to match your own ability and to increase the value if you gain strength. All of this can be easily done by turning the small black dial Ergonomic Design- Hand Strengthener Non-slip rubber grips well prevent it from accidentally slipping out of your hand when it gets sweaty and wet. Perfect for men, women, seniors and youth Practical and Necessary- Hand Grip It is perfect for improving the strength, power and speed of the fingers, palms, wrists and forearms, and helps relieve stress. Ideal for athletes, musicians, pianists, climbers, golfers, bodybuilders, players tennis, etc Durable- Stainless Steel Spring & Solid Steel Hinge Hand Grip Clamp: Strong stainless steel spring and solid steel hinge lead a perfect hand grip for your daily workout for a long time Premium MaterialHandle is made of non-slip soft rubber and stainless steel spring, sturdy and durable. Reinforcement of the handle The ergonomic soft handle is comfortable to hold and will not damage not your palm. Whether at home, on the go or in the office, our finger cots are the perfect companion. Function: Strengthen your fingers and forearms, strengthen your grip."