The EZONE SD irons come equipped with a YONEX NANOSPEED 200 graphite shaft. Greater distance with more forgiveness. This is what YONEX engineers were tasked with when producing the EZONE SD irons. The Double Undercut Cavity increases the size of the sweetspot and therefore the area of maximum effectiveness. The proven Power Flow Weight System adjusts the position of the visible weight within each iron to promote quality of strike and the New Sole Construction reduces friction with the ground to ensure smooth acceleration through the ball.