This grip strength tester and trainer kit is designed to measure and improve hand, wrist, and forearm strength with accuracy and convenience. It combines a hand grip dynamometer for testing strength levels with a training function to help users progressively build grip power over time. The ergonomic design ensures a comfortable hold during both testing and training, making it suitable for athletes, fitness enthusiasts, rehabilitation users, and anyone looking to improve hand performance. It provides a practical way to track strength progress and set personal fitness goals.