Mizuno JPX 921 Hot Metal Irons

Mizuno uses a steel alloy called chromoly in a single-piece casting to create the thinnest, fastest face in company history—2.2 millimeters at center and as thin as 1.9 millimeters at the extremes. The result is an iron that can produce ball speeds normally only seen in irons with cupfaces, sole slots or face-insert designs. As with virtually every Mizuno iron, the sensation at impact is impressive. The Hot Metal has a perimeter undercut cavity with updated ribs designed to support the frame for improved sound and feel. A degree stronger loft (29 degrees in the 7-iron) helps with distance.