※ Purchased new and used on the course twice. I am selling it because I am now using a different product. YAMAHA inpres DRIVE STAR Shaft: Speeder NX for Yamaha M423i Carbon shaft Model: 2023 Shaft stiffness: SR Club number: 5 iron Loft angle: 21° Lie angle: 60.75° Construction: X37 precision casting, tungsten weight Shaft weight: 47.5g Shaft flex: Mid Club length: 39 inches Balance: DO Club weight: 335g Grip: Lamkin Crossline Genuine product Club: Made in JAPAN ★ Concentrates the "impact point" and "center of gravity" at the "center of flex". Maximizes distance. In general irons, the "center of flex," where the face flexes the most, is often far from the impact point and center of gravity. By effectively placing ribs, the center of flex is brought closer, maximizing the efficiency of distance.