Callaway I-MIX FT-9 Driver Head (Neutral) The ultimate in interchangeability that allows golfers to select from numerous clubheads with Fusion Technology and dozons of shafts to find the correct driver that meets the challenge of the day. The FT-iQ and FT-9 heads represent the finest in driver technology Callaway Club has to offer for maximum distance and accuracy. Shafts and clubheads can be quickly and easily assembled and disassembled with the torque wrench. Available shafts are made by some of the best-known and most-respected manufacturers in the industry.