Forged in Hiroshima
One-piece Grain Flow Forged HD from 1025E Pure Select steel, six times tighter tolerance than industry standard.
Mizuno's compact, Hiroshima-forged muscle back for elite control and feel
Mizuno Golf · IronsThe Mizuno Pro S-1 is Mizuno's refined player's blade, built for golfers who demand precision, control and feel. Grain Flow Forged HD in Hiroshima, Japan from 1025E Pure Select mild carbon steel, it pairs a sleek, compact profile with a copper underlay for an exceptionally soft, responsive strike. A channel back design, tour-tested sole and Soft White Satin finish complete the look.

Why golfers choose it
One-piece Grain Flow Forged HD from 1025E Pure Select steel, six times tighter tolerance than industry standard.
A copper underlay beneath the nickel chrome and Harmonic Impact Technology tune feel and feedback.
A dramatically reduced topline and blade length for the shot-maker.
Product details
| Brand | Mizuno |
|---|---|
| Model | Pro S-1 Irons |
| Head type | Muscle-back blade |
| Construction | Grain Flow Forged HD in Hiroshima, Japan from 1025E Pure Select mild carbon steel |
| Finish | Nickel chrome, Soft White Satin |
| Sole | Tour-tested sole; triple cut sole |
| Stock shaft | KBS Tour (steel) |
| Set makeup | 4-PW (7 pc) |
| Hand | Right or Left |
The S-1 is for skilled ball-strikers who want the most workability and feedback. For a little more help, look at the Pro S-3 cavity or the Iceberg combo set that pairs S-3 long irons with S-1 scoring irons.
Product questions
Grater Golf support
Tell us your swing speed, current clubs and goals, and we’ll help you choose and build the right Mizuno irons.
Ask Grater GolfFree standard shipping on most orders $100+ within the contiguous U.S. Eligible items may be returned within 30 days. Custom, modified, cut, installed, and made-to-order products may be final sale.