Yonex EZONE GT

Normally the shaft wouldn't be the talking point for an iron, but when you have golf's first use of a material, it's worth touting. This iron has a shaft that is reinforced by Namd—a material that dramatically improves the adhesion of the graphite fibers and resin, resulting in a high-strength and lightweight shaft. The explanation of how it does that should be reserved for an advanced chemistry class, but all you need to know is that the result is increased shaft flex for potentially higher ball speed.