Inspired by the iconic blades of Mizuno past " evolved to be more playable through incremental refinements in shape and weight placement. Beveled for the appearance of a shorter face profile and narrower top line " without loss of mass in the upper blade. With dramatically more compact scoring irons than its predecessors. Grain Flow Forged in Hiroshima, Japan, with a soft copper underlay for a uniquely satisfying Mizuno sensation at impact. TECHNICAL DETAILS: Grain Flow Forged HD: One-piece Grain Flow Forged HD from 1025E Pure Select mild carbon steel at Mizuno's iconic facility in Hiroshima, Japan " where Mizuno irons have been produced since 1968. Harmonic Impact Technology: Fine tuned head geometry delivers ideal impact feel and feedback 1025E Pure Select: Six times tighter tolerance than industry standard for greater purity Copper Underlay: Thin copper layer beneath a nickel chrome to provide a further enhanced impact feel