Callaway redesigned the new Apex Pro 21 iron from the ground up, with an innovative A.I. face architecture and all new forged hollow body construction. Any scratch or single digit handicapper who wants speed and forgiveness in a players performance iron needs to try the Apex Pro 21. A.I. designed Flash Face Cup is in a forged Apex Pro Iron for the first time ever. The unique Flash Face architecture in each iron creates high COR's for fast ball speeds, and improved spin robustness for every club. This set is engineered for the distance you want to see, and better control than you've ever had before. The all-new forged 1025 hollow body construction and Callaway's patented urethane microspheres provide a remarkable blend of sound and feel at impact that players expect. For the first time, Callaway has implemented a massive Tungsten Energy Core into an Apex Pro Iron. The hollow body construction includes up to 90 grams of tungsten per iron, the most ever in an Apex Iron. This Tungsten Energy Core improves launch characteristics while simultaneously improving forgiveness. Standard Callaway warranty applies and satisfaction is guaranteed.