Mizuno MP-15 Irons 3-9P Regular Flex Dynamic Gold Steel Shaft Right HandedMizuno MP-15 Steel Irons 3-9P Available in stock now! At address the MP-15 appears every inch like the classic Mizuno MP iron - compact with clean lines, designed to enhance both feel and workability. Forged directly inside the 1025E steel framework is a re-engineered Titanium Muscle insert, which maintains thickness behind impact for solid feel, while allowing weight to be shifted to the perimeter to provide "full cavity" forgiveness. The MP-15's refined Ti Muscle weighs just 10g (replacing 38 grams of steel) - yet its increased curvature and thickness ensure that feel is not sacrificed to achieve off centre stability. A reworked steel framework also ensures that the body and insert work as one to maintain solidity at impact. The playing profile and head-size of the MP-15 is based on the classic MP-64 - with 10% greater forgiveness created through the use of the Ti insert. As the Ti insert is engineered to create off centre stability rather than launch forgiveness, trajectory is comparable to Mizuno's more traditional tour irons.