Mizuno MP FLI-HI Iron Hybrid with Project 5.5 Shaft Mizuno MP Fli-Hi 2010 The Hollow Construction aids in positioning the CG low and deep for a high, penetrating ball flight Hot Metal construction is created by plasma welding a thin, hot maraging steel face to a high-tech stainless steel body Durable double nickel chrome plated finish along with Black chrome stainless steel muscle medallion MP Player preferred head shape