Developed following extensive testing with PING's top tour pros to meet their “must haves” -- control and precision -- Blueprint S delivers the score-lowering performance demanded by the best players in the world. COMPACT SHAPE The compact shape fits the discerning eye with a thin top line and minimal offset. The 8620 carbon steel head boasts a clean cavity design, distinguished by an eye-catching forged textured pattern and hydropearl 2.0 chrome finish. PRECISION POCKET FORGING This patented forging technique allows PING to forge a pocket into the cavity of the 3, 4 and 5 irons. The pocket saves 10 grams of weight, which is re-allocated to increase the MOI and optimize the center of gravity position for more distance and trajectory control.