The Callaway I-Mix drivers have groundbreaking do-it-yourself club customisation technology, giving all golfers the opportunity to mix different driver heads and shafts to create the perfect club for their game, course and conditions. I-Mix, which capitalises on the U.S. Golf Association and Royal & Ancient’s rule change on club adjustability, is available with FT-i and FT-5 club heads, and a wide variety of high-performance shafts from manufacturers including Aldila, Fujikura, and Mitsubishi Rayon. More than 1,400 shaft-head combinations give golfers the opportunity to customise their driver for each and every round they play. I-MIX Technology also includes Callaway Golf’s Opti-Fit Weighting System, enabling golfers to choose a club head with a Draw or Neutral bias to help counteract their most common swing flaws for longer and straighter drives.