A mid-sized, full body Grain Flow Forged iron delivering a perfect balance of ball speed, stability, and feel. Grain Flow Forged HD: One-piece Grain Flow Forged HD from 1025E Pure Select mile carbon steel at Mizuno's iconic facility in Hiroshima, Japan. Where Mizuno irons have been produced since 1968. Chromoly 4120: With its high weight to strength ratio and malleability, Chromoly allows for high strength face with a bendable hosel for fitting. Harmonic Impact Technology: Fine tuned head geometry delivers ideal impact feel and feedback Back Milling: CNC milled from the sole up creating a larger area of minimum face thickness for consistently increased ball speeds. V-Chassis: Engineered via Mizuno's Harmonic Impact Technology, the V-Chassis allows the top line to be thinner without sacrificing feel and sound. Triple Cut Sole : Beveled trailing edge and blunted leading edge ensures clean turf interaction for solid contact. Black Ion Finish: Fully blacked-out plating creates the illusion of a more compact profile. CORTECH Design: Optimized face thickness distribution to maximize COR AREA