Finally, the MP-20 HMB, the most forgiving option in the lineup, returns Mizuno to the two-piece hollow forged iron design model. It is this ever-growing segment of the iron market that Mizuno largely started with clubs slightly under the radar like the MP-H4 and MP-H5 before moving away from it. The MP-20 HMB mixes two kinds of iron designs within the same set, featuring the hollow, two-piece concept in the long and middle irons (2- through 8-iron) and a partially hollow construction in the short irons (9-iron, pitching wedge) to raise the center of gravity for more trajectory control. The unique constructionin the long and middle irons includes a forged chromoly steel face and hosel section joined to a stainless steel body. The body houses twin 12-gram tungsten weights positioned low in the heel and toe. That internal weighting adds stability and lowers the CG while keeping the soles from getting too wide. Those long irons also exist as a direct replacement in the both the MP-20 and MP-20 MMC.