Wilson Sporting Goods Men's Ci11 Premium Iron Set, 4-PW Control; The Ci11 Irons are for a golfer who wants the look of a player's club at the address and who wants power to generate distance while still needing a forgiving club. Player's Look-Power and accurracy delivered with an eye toward classic head size and shape. The sleek, black, PVD finish reduces the visual size of the head and serves to reduce glare at address. Exoskeleton weighting-The re-engineered exoskeleton surrounding the rear cavity optimizes MOI and stability by pulling weight away from the face and then pulling toward the heel and toe. A one-piece, soft-response insert is ensconced in soft 431 stainless steel to satisfy sound and feel at impact, even on off-center hits. A thinner, harder face promotes the maximum CT allowed by the USGA for stronger ball flight and greater distance.