Goliton Sport Gym hand gripper Adjustable 11-44 lb grip strengthener exerciser wrist strength training-purple The adjustable hand gripper is ideal for everybody want to develop and train hand, wrist, and forearm strength. You can adjust the level depending on your grip power Adjustable resistance range: 11-44 lb (5~20kg) Ergonomic design Easy adjust resistance by turning the knob Designed to provide a full range of motion on each and every exercise and keep you in shape for a lifetime