ADJUSTABLE RESISTANCE- Gripper Hand Strengthener The adjustable resistance range of the hand strengthener is 22-110 lbs (10-50 kg), allowing you to adjust the resistance to match your ability and gain increase value power. All of this can be done easily by turning the black small dial ERGONOMIC DESIGN- Reinforced rubber non-slip grip on the hand prevents accidental slipping of your hand when sweating and getting wet. ALL AGES CONVENIENT AND ESSENTIAL- Bodybuilding Grips are great for improving strength, strength and speed in fingers, palms, wrists and forearms, and help relieve stress. Perfect for athletes, musicians, pianists, climbers, golfers, bodybuilders, tennis players and more. Hand Stainless Steel Springs and Solid Steel Hinges: The sturdy stainless steel springs and solid steel hinges give you the perfect hand grip for your daily workouts Premium MaterialThe handle is made of non-slip soft rubber and high quality stainless steel springs into, sturdy and durable. Handle Reinforcement Ergonomic soft handle is comfortable to hold and won't damage your palm. Whether at home, on the go or at the office, our finger cots are the perfect companion.