A hand gripper is a simple exercise tool designed to strengthen the muscles in the hands, fingers, and forearms. It typically consists of two handles connected by a spring mechanism, allowing users to squeeze the handles together. This action helps improve grip strength, which is beneficial for various activities, including sports and daily tasks. Hand grippers come in different resistance levels, making them suitable for beginners and advanced users alike. Regular use can enhance overall hand dexterity and endurance, contributing to better performance in activities like rock climbing, weightlifting, and even playing musical instruments.