The Mizuno Pro Fli-Hi has become a fixture with the majority of Mizuno's tour players. An easy launching, powerful long iron replacement that flows seamlessly into either the Mizuno Pro M13, M15 or full iron set. With a chassis now fully upgraded to 4335+ Nickel Chromoly for elevated ball speeds NICKEL CHROMOLY 4335+ HOLLOW BODY CONSTRUCTION Utilizing a heat-treated ultra high strength Chromolly for elevated average ball speeds, with a more pliable body and bendable hosel. INTERNAL TUNGSTEN WEIGHTING 26 grams of weight low in the head for elevated launch compared to traditional long irons.OFFSET FACE WELD: Placing the weld line inside the upper face-gauge allowed a thinner topline. On the bottom edge, the weld line is back from the face, allowing greater flex and ball speeds from low on the face. HARMONIC IMPACT TECHNOLOGY Applied to best match the vibration patterns Mizuno's tour players identified with a soft muscle-back feel. INCREASED BOUNCE ANGLE Increased by a degree for improved turf interaction.