WIDE APPLICATIONS: Grip strengthens forearm grip, improves wrist, finger and forearm strength, power and speed, ideal for rock climbers, tennis players and athletes, and enhances finger and wrist flexibility. Comfortable: The finger exerciser is comfortable to hold. The resistance of the grip strengthener is ideal for men and women with varying strengths. Adjustable: Double spring hand exerciser, adjustable, easily adjustable from 5kg to 60kg; Portable: The grip trainer is easy to carry and use anywhere: at home, at work, traveling, outdoors. GIFT: This is the perfect gift choice for sports, golfers, boxers, drummers, guitarists, pianists and more. Specification: Material: PP, steel size chart: 10cmx15.5cm/3.94inx6.10in Package includes: 1x gripper notes: Please allow slight errors due to manual measurement and different monitors.