Wilson Pi5 Irons. As used by Padraig Harringon to win the Open Championship at Carnousite in 2007. The unique back weighting of the Pi5 design goes 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 - and 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. Each iron in the Pi5 series is designed to move a precise amount of mass to the club’s periphery, creating maximum forgiveness during off-centre hits. The compact head design features thinner top-lines and progressive sole widths from the short to long irons, offering a more traditional iron appearance.