Adjustable - The adjustable resistance is designed from 5 to 60 kg, which can increase or decrease the tension of the hand according to your needs, effectively exercise the flexibility of the hand, wrist and forearm. The grip strength is automatically counted, and the lower part of the trainer is equipped with a mechanical counter, which can organize your exercise plan reasonably by strengthening the hand to clearly record the number of times. Quality Design - The grip has a comfortable non-slip rubber grip toned, high-quality spring steel is selected for production, high temperature resistance, good rigidity, and long service life, so the gripper itself is more durable, safer, and won't damage your hands and fingers . Portable and Compact - The hand exerciser is about 10*15cm and can be easily stored in your pocket or backpack, allowing you to practice anytime, anywhere. Perfect for home, gym, office or walking, watching TV, outdoors and traveling. Wide Application - Improves finger strength and flexibility for guitarists, climbers, pianists, pianists in tennis, boxing, golf and fitness. It can reduce joint stiffness, release daily stress, and effectively exercise grip strength, wrist strength, forearm, etc. Perfect for athletes, musicians, climbers, golfers and tennis players, home, office, outdoor activities and travel.