Creating a hot face in an iron without resorting to the cupface and L-face designs found in a lot of the clubs on our list is a difficult endeavor. However, Mizuno achieves it by using a special kind of steel called chromoly 4140M, a material that has been used in hightech bicycle frames. With a high strength-to-weight ratio, the steel allows Mizuno to make a face as thin as 1.9 millimeters in certain areas, resulting in more flexibility that produces surprising distance. Three additional ribs added to a structure inside the topline further stabilize the frame and optimize feel. You might need a doctorate degree in acoustics to understand the sophisticated work Mizuno has done in the area of sound throughout the years, and the company has done it again here, delivering a pleasant tone at impact—not an easy accomplishment in a face this thin. Having learned that a substantial portion of its iron orders are for mixed sets, Mizuno fine-tuned the specifications of the entire Hot Metal family to better align the irons and their lofts, making for a seamless transition for those who might want to pair the Hot Metal long and middle irons with the Hot Metal Pro short irons. Read more >>