Designed specifically for fitness enthusiasts and rehabilitation trainers, this grip strength device is a powerful assistant for hand strength training. Selected high-strength alloy springs have undergone multiple fatigue tests to ensure durability and stable rebound force. The ergonomic design of the handle conforms to the curvature of the palm, with delicate anti slip patterns, providing a comfortable grip and reducing hand fatigue. Multiple resistance adjustments from 5kg to 100kg to meet training needs at different stages. Beginners start from a light level and gradually improve; Advanced players can challenge high-end, strengthen muscle strength and endurance. A few minutes of daily grip strength training effectively enhances finger and wrist strength, improves grip strength, prevents hand injuries, assists in sports such as rock climbing and tennis, and also helps office workers relieve hand stiffness, stimulate hand vitality, and easily start a healthy life