Don't Worry... These will always forgive you. Partners Club Seal of Approval We developed our M2 Irons for the beginning to intermediate player. These irons are constructed of a polished 431 stainless steel body and have a hi-vector sole that optimizes ball flight without sacrificing feel The exclusive "M-Back" cavity design evenly distributes weight across the sweet spot for greater playability and performance on off-center hits. Set includes 5,6,7,8,9,PW,SW. If your bag requires a 3 and/or 4 Iron, please call to place order.