Callaway Golf X-22 Tour Irons Set, Set of 8 Clubs (3-PW) Precision Notch Weighting creates a higher MOI for more stability while maintaining the optimal CG position that produces ideal trajectories and feel. Tour-proven head shape features a thin topline, shorter blade length, and a lower in-line CG. Redesigned hosel is sleeker to significantly improve feel and adjustability. Sole width progression optimizes turf interaction through the entire set. Callaway Golf core technologies include VFT and a 360-Degree Undercut Channel.