FUJIKURA 2025 MCI 100 IRON SHAFTS (.355)MCT (Metal Composite Technology) Compared to steel shafts, carbon shafts have a center of gravity closer to the grip, which affects the club's swing weight. Adding more fiber to the tip to improve this increases rigidity, which can have the negative effect of impairing feel. The development of "MCT" has made it possible to adjust the shaft's center of gravity while also achieving the high level of control that comes from the "smooth movement"