Despite a devoted following among highly skilled golfers for its forged-iron creations, Mizuno’s cast irons remain among its most successful in the market. Expect the JPX921 Hot Metal Pro to continue that trend. The combination of a unique steel alloy and a smart design allowed Mizuno to make a forgiving, powerful iron in a relatively compact package. Helping achieve this is the use of high-strength chromoly steel to make the thinnest face in company history at 2.2 millimeters in the center and as thin as 1.9 millimeters in some spots. Sometimes design features can go unnoticed even though they are valuable. That’s the case with the variable-thickness-sole design with a thin area at the leading edge that behaves like a hinge, allowing the already flexible face to rebound even more, particularly on shots struck low on the face. After studying vibration patterns, Mizuno’s designers updated the perimeter undercut cavity, adding three ribs to further support the frame of the iron for better sound and feel. The lofts have been bumped down a degree to keep consistent loft gaps for those mixing these irons with the standard Hot Metal model. Read more >>