Mizuno MP-63 Irons Set 3-PW Forged (Steel Dynamic Gold Stiff) MP63 Golf Clubs Forged -These irons are forged from 1025E Pure Select mild carbon steel to deliver superior sound and feel. Standard Headsize -The MP-63s retain the MPs iconic standard headsize and thin topline. Slight Offset -The MP-63 irons have very little offset to promote better control and shot-shaping capabilities.