The NEW Apex 21 Irons deliver an extraordinary level of forged performance and craftsmanship. They�re the first forged iron designed with Artificial Intelligence for faster ball speeds and improved spin consistency. Increased forgiveness comes from the massive Tungsten Energy Core. Callaway has enhanced the shaping for even better turf interaction. In short, these irons deliver superior performance with iconic feel on every swing. A.I.-designed Flash Face Cup is in a forged Apex Iron for the first time ever. The unique A.I. architecture in each iron creates high ball speeds and increased spin robustness across the face. They're engineered for impressive distance and pinpoint control. For the first time, Callaway has implemented a Tungsten Energy Core into an Apex Iron. With 5x the tungsten of Apex 19, engineers can precisely position the Center of Gravity to promote outstanding launch throughout the set, and more forgiveness on off-center shots. Apex Irons are renowned for their pure feel, and Apex 21 is no different. The body of the iron is 100% forged from a 1025 mild carbon steel body, and Callaway's patented urethane microspheres deliver exceptional sound and feel at impact. The improved shaping also helps to enhance feel through the turf. If you would like to customize the shafts, grips, lengths or lies give us a call or send an email to Tom@dallasgolf.com. Standard Callaway warranty applies and satisfaction is guaranteed.