Wide Application: The hand grip strengthener the forearm grip improving strength, power, and speed in the wrists, fingers, and forearms, great for rock climbers, tennis players, and athletes, and it enhances the flexibility of fingers and wrists. Comfortable : Thefinger Exerciser comfortable holding. The resistance of the hand grip strengthener is perfect for both men and women with different strengths. Adjustable: Hand exerciser with double spring,adjustable ,which can be adjusted from 5kg to 60kg easily; Portable: Grip Exerciser is easy to carry and use anywhere: at home, workplace, or travel, outdoor. Gift: This is a perfect gift choice for someone who is a sports, golf player, boxing, drummer, guitarist, pianist, and much more. Specification: Material: PP, Steel Size Chart: 10cmx15.5cm/3.94inx6.10in Package Includes: 1x Hand Gripper Note: Please allow slightly errors due to manual measurement and different monitors.