The Wilson Staff Pi5 Performance Irons have unique back weighting design from an undercut cavity in the long irons to a standard cavity back in the short irons. This design progressively moves the CG location giving players an arsenal of advantages, from a higher flight with more forgiveness to a lower, more controlled ball flight for maximum shot making capabilities, all with the soft feel of 431 stainless construction. With a low density carbon weave support, the Pi5 features a thin, high COR face to provide a generous sweet spot in a conventional head size. Each iron in the Staff Pi5 series is designed to move a precise amount of mass to the club?s periphery, creating maximum forgiveness during off-center hits. The compact head design of the Pi5 irons features thinner top-lines and progressive sole widths from the short to long irons, offering a more traditional iron appearance. Tour proven and meticulously weight sorted True Temper Dynamic Gold shafts in a .355 taper tip help maximize control and accuracy of the Staff Pi5 irons.