Mizuno JPX-921 Hot Metal Irons Specifications

Full factory loft, lie and length chart for the Mizuno JPX-921 Hot Metal irons, 2020–2022.

Check Mizuno JPX-921 Hot Metal prices on eBay Affiliate link

Years produced: 2020–2022
Category: Game Improvement Irons
Construction: investment cast
Material: Nickel Chromoly 4335
Set makeup: 4–LW

Data confidence: medium. These figures are compiled from secondary sources rather than a manufacturer spec sheet. If you have an original catalogue page, send it over and we will update the chart.

Loft, lie & length chart

Standard men's steel-shaft specifications for the Mizuno JPX-921 Hot Metal irons.
Club	Loft (°)	Lie (°)	Length (in)	Offset (in)	Bounce	Swing wt
4	19	60	38.5	0.224	0	D2
5	22	60.5	38	0.213	0	D2
6	25	61	37.5	0.201	0	D2
7	29	61.5	37	0.189	1.5	D2
8	34	62	36.5	0.173	2.5	D2
9	39	62.5	36	0.154	3.5	D2
PW	44	63	35.5	0.15	5	D3
GW	49	63	35.25	0.134	7	D3
SW	54	63	35.25	—	13	D3
LW	59	63	35.25	0.063	10	D3

Lofts and lies are the factory standard build. Individual clubs may differ if they have been bent, re-shafted or re-gripped during their life.

Shop Mizuno JPX-921 Hot Metal

Compare prices for new and used sets on eBay:

See eBay listings

We may earn a commission from purchases made through links on this page at no extra cost to you.

Loft progression

Loft for each club, 4 to LW. The Gap row is the loft added from one club to the next; gaps run from 3° to 5°.

The 7-iron face, drawn at its 29° loft from the chart. Head shape is schematic, not to scale.

About the Mizuno JPX-921 Hot Metal

The JPX-921 Hot Metal moved from the Chromoly 4140M of the JPX-919 to Nickel Chromoly 4335, a stronger alloy that let Mizuno thin the face to 2.0 mm and add a seamless cup-face design. It is the wide-soled, high-offset member of the 2020 JPX family, with offset from 0.224 inches in the 4-iron down to 0.063 inches in the lob wedge, and was sold as a 4-iron through lob wedge set. Lofts are two degrees stronger than the JPX-921 Forged of the same generation: the 7-iron is 29 degrees and the pitching wedge 44 degrees. Lofts, lies and lengths listed are the men's standard steel-shaft build.

Stock shafts

Nippon N.S. Pro Modus3 Tour 105 — steel
Nippon N.S. Pro 950GH — steel

Related models

Frequently asked questions

What is the loft of a Mizuno JPX-921 Hot Metal 7-iron?

The Mizuno JPX-921 Hot Metal 7-iron has a loft of 29 degrees, with a 61.5-degree lie and a 37-inch steel-shaft length.

How much stronger are JPX-921 Hot Metal lofts than JPX-921 Forged?

Two degrees through the set. The Hot Metal 7-iron is 29 degrees against 31 degrees for the Forged, and the Hot Metal pitching wedge is 44 degrees against 45 degrees.

What is the pitching wedge loft on the Mizuno JPX-921 Hot Metal?

The JPX-921 Hot Metal pitching wedge is 44 degrees. The stock set continues with a 49-degree gap wedge, 54-degree sand wedge and 59-degree lob wedge.

Finding a used set

The Mizuno JPX-921 Hot Metal ran from 2020 to 2022 and is no longer in production, so the used market is the only source. Search the used listings on eBay, and check the loft and lie against the chart above before buying — sets this age have often been bent from standard.

Data compiled from:

tgw.com Golf Guide, Mizuno JPX 921 Hot Metal Irons review specification table (loft/length/lie/bounce/offset/swingweight, 4-LW)
2ndswing.com Mizuno JPX 921 Hot Metal Iron Set specification table (independently corroborates loft/lie/length/offset for 4-GW)
Sand wedge offset is omitted: the only published figure (0.138 inches) is larger than the gap wedge value in the same table and could not be corroborated.

Last updated 28 July 2026. Spot an error? info@loftchart.com