Our latest technology for drivers, the Shaft Stabilizer™, significantly improves swing consistency by optimizing the Moment Of Inertia (MOI) of the butt end of the club to maximize inertial stability. In other words, the improved MOI increases the controllability of the club. Ninety six percent (96.8%) of golfers fit have experienced improved swing consistency equating to more ball strikes with the club head’s sweet spot. The Shaft Stabilizer™ is designed to enhance “FEEL”, engineered to maximize efficiency, Tour tested for performance, and is made in the USA. If you want to feel the extra weight in your hands then this is the weight for you. Be sure to purchase the Shaft Stabilizer™ tools so you can install the weight properly.