JPX921 Hot Metal

Hot List Gold 2022

Our Review:

WHAT IT DOES: 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.

WHY WE LIKE IT: There are not many companies, if any, that can introduce four sets of irons with the same basic nomenclature and have you believe each has an audience. But that’s what Mizuno has done with its JPX921 lineup. In this instance, the Hot Metal model has a slightly expanded footprint compared with its affiliated Tour and Forged models. It’s also on the compact side of the game-improvement category. A strong proponent of fitting, Mizuno continues to enhance its Shaft Optimizer, first introduced in 2010 to allow golfers to narrow their shaft choices in just a few swings. Read more >>

Price: $125/per iron
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Look / Sound / Feel




* Percentage of total score

Player Comments

"These go straight up in the air, and it isn't so much spin. They kick it up there. I really like the attention to detail, and the way they subtly shade the head to camouflage the size."


“A chrome finish that lulls you into thinking this club is standard issue. It’s not. The highlight is the metal they’re using. The feel is unparalleled.”


"A really good feel combined with excellent distance. Had to double check the numbers. Far and straight with excellent feedback. It’s like it had a gyroscope—it wouldn’t go left or right."

Club Specs


7-iron: 29 degrees; PW: 44 degrees

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Surviving the Hot List Presented by Rapsodo

For the first time in the 19-year history of the Hot List, we invited a documentary-film crew to the 2022 testing summit to document the process, the people and the drama behind the most coveted assignment in golf.