Mizuno Pro 245 irons now feature a more compact head shape with a thinner topline profile and multi-thickness CORTECH face that produces faster ball speeds. Grain Flow Forged steel is combined with a hollow body construction for higher, more stable flight with increased ball speed. A suspended tungsten weight in the 2i-7i pushes the CG to its lowest possible point above the sole to improve launch and power. Harmonic Impact Technology is also enhanced to reduce sound pressure at impact for a pure feel.