Callaway X-22 Individual Iron with Steel Shaft Callaway has always had the same goal in mind when it comes to X Series irons set the performance standard for the industry. The new X-22 Irons don t disappoint and are the best X Series irons Callaway has ever created. By maximizing perimeter weighting, these irons boast an MOI (moment of inertia) that s 10% higher than their predecessors. The ideal CG (center of gravity) position has been preserved, generating optimal ball-flight trajectories. The Modified Tru-Bore design has been incorporated, dampening vibration for enhanced feel and the tour-inspired head shape has a slightly thinner topline and sole with a large sweet spot for improved aesthetics and forgiveness that will boost any golfer s confidence. Features: True Temper High Launch Uniflex shaft Precision notch weighting raises the MOI while maintaining the optimal CG position Tour-inspired head shape includes a thinner top line and narrower sole Modified Tru-Bore