The XR Pro Irons have taken the Cup 360 that’s redefined ball speed on the fairway woods and brought it to these irons. The Face Cup not only acts like a spring on shots hit low on the face, it increases ball speeds everywhere on the face too. The distance is incredible, and that’s just the start. When you factor in the lower CG, compact head shape, forgiveness, the face flex of the Internal Standing Wave, and precise 2-piece, deal heat construction, you can see why Callaway wants to get these irons in your hands right away.