Only the greatest breakthroughs are worthy of being called an r15 years of our groundbreaking metalwoods technologies from the 1 driver in golf have been fused with brand new innovations into a single game changing design we put everything we have into the r15 so you can find out what you havemdashin youeverything we have learned on low forward cg sliding weights speed pocket and adjustability have gone into the r15 making this our most technologically advanced driver everb