MULTI-METAL STABILITY DESIGNLightweight Maraging steel face and Tungsten toe weight (20g) to for a high, stable ball flight.PLAYER'S COMPACT PROFILE: Just 1mm thicker topline than the corresponding MP-18 muscle back.MASTER MOULD TOUCHED BY YORO CRAFTSMAN: Mizuno's most experienced, skilled craftsmen put their finishing grinds and touches to every iron head.FLOWS INTO ANY MP-18 SPLIT SET: Calculated to flow into any MP-18 iron model.