The Maltby MPF Pro Series + Graphite Iron Shafts are extremely consistent graphite iron shafts that are 100% frequency tested in both 90Adeg and 0Adeg shaft planes for a very tight shot dispersion. Weight options change based on swing speed for improved weight to flex matching. Features: Designed for improved flex and weight matching Tip structure and the overall flex profile designed to provide increased control and improved shot dispersion 100% frequency tested in both the 90Adeg and 0Adeg shaft planes for perfect shaft oscillation Stable tip design combined with generous torque measurements helps to square the face at impact for more consistent and longer drives Designed for players looking to maximize distance without sacrificing accuracy