Improved Function, Strength, and Performance Whether your goal is to do more pull-ups, perform heavier deadlifts, play a more competitive tennis game, or climb a mountain, grip strength is crucial. It’s easy to focus on big muscles like back, hamstrings, or shoulders and forget the crucial role of grip strength. Overall strength, muscular development, and athletic performance requires the support of strong forearms, wrists, and hands. Even daily activities like carrying bags and opening jars require a strong grip. The Leosportz Hand Grip and Wrist Strengthener is a simple yet effective training tool for overall improved performance.