Sinvitron Hand Gripper - Best Hand Exerciser Grip Strengthener Adjustable Resistance Range 10-40 Kg for Increasing Hand Wrist Finger Forearm Strength This hand grip strengthener is ideal for improving strength, power and speed in the wrists, fingers and forearms. Ideal for athletes, musicians, rock climbers, golfers and tennis players Hand grippers also work great for rehabilitation. If you suffer from rheumatoid arthritis, arthritis, carpal tunnel, tendonitis, tennis elbow and are on the way to recovery from a fractured or broken wrist, or tendon surgery, then this is the perfect gripper for you This tool is constructed to be durable and offers users a top quality design with stainless steel tension springs, comes with adjustable dial that can be adjusted from 22 to 88 pounds (10-40KG) Ergonomically designed and it fits well for all hand sizes, perfect for men and women, seniors and teens TPR handle, good elasticity, prevent slippery design, comfortable and durable rubber for frequent and comfy usage