Project X iron shafts are trusted by the best players in the world and are a staple in golf shaft design. Maintaining a stout profile throughout the entire shaft, Project X is a preferred choice by stronger swingers looking for a flat, penetrating ball flight and unmatched stability. Project X shafts incorporate Stepless Design Technology (SDT) where each individual shaft throughout the set is comprised of a specific taper length. This unique design feature optimizes the flex distribution and energy transfer of the shaft without sacrificing control. SDT provides tip stiffness for stronger players, producing greater accuracy, a smooth yet solid feel on impact and optimal trajectory and spin control. Fit & Design: 355" tip diameter Features a long taper rate that actually achieves a more dynamic transfer of shaft energy to the ball Available in individual lengths #2 iron through #W