Stiff Flex Mizuno Pro 241 irons build off of the success of the 221 line with a refined head shape made from 1025 Forged steel The tapered blade design is thinner than the previous model but with more mass behind the face for a more solid feel Harmonic Impact Technology improves sound and feel with a more muted sound pressure at impact to produce a softer cleaner strike GlobalGolfcom online store offers superior selection service and quality for your Mizuno golf Clubs needs