Twenty years of development marks the end of the titanium era. The all new 60X Carbon Twist Face is 44% lighter than an equivalent titanium face, while also being 11% larger than SIM2 and SIM2 Max drivers and nearly 20% larger than the 2020 SIM driver. Sixty layers of carbon fiber have been strategically designed to optimize energy transfer to deliver fast ball speeds over a large area, resulting in optimal distance and forgiveness. 10.5 degrees, left hand, regular flex.