Developed following extensive testing with our top tour pros to ensure control and precision, Blueprint S adds forgiveness to the mix to deliver score-lowering performance. The fully forged, 8620 carbon steel head boasts a clean cavity design and optimized CG for distance and trajectory control. Precision-Pocket Forging, a patented process that creates a pocket in the cavity, saves weight to increase forgiveness in the 3, 4 & 5 irons.