Callaway Quantum Max OS Iron Set (QUANTUM MAX OS STS)

Who’s It For?

Designed for golfers who want maximum forgiveness and confidence at address, these irons are ideal for players who benefit from an oversized shape that makes solid contact easier across the entire face. They’re built for those seeking powerful speed, dependable carry distances, and help tightening dispersion, especially if consistent ball striking is a challenge or if extra stability and ease of use inspire more trust in every swing.

The Tech Story

The Callaway Quantum Max OS Irons combine a powerful suite of technologies engineered for higher launch, maximum forgiveness, and confidence‑driven performance. A Modern 360° Undercut Cavity utilizes a two‑piece construction with extreme perimeter weighting and a fully exposed undercut, creating greater face flex for faster ball speeds, higher trajectories, and enhanced forgiveness across the entire face. The Progressive Tri‑Sole Design refines turf interaction by tailoring sole geometry from long irons through wedges, helping players achieve cleaner, more consistent strikes and maintain speed even when contact is heavy. Callaway’s Next Generation AI‑Optimized Face further elevates performance by shaping each face to real‑world impact patterns, producing more consistent launch, spin, and dispersion while expanding the effective sweet spot. Urethane Microspheres absorb unwanted vibrations to deliver a softer, more forged‑like feel without sacrificing speed or distance. All of this technology is wrapped in an oversized, confidence‑inspiring shape designed to help golfers launch the ball easier and hit more solid shots with reliable forgiveness.

Facts and Figures

Construction: Cast

Category: Super Game Improvement

Stock Set Makeup: 4 – PW

Quantum Max OS HL Specs are 2° Weak

Stock Shafts and Grips

Stock Steel Shafts: True Temper Elevate 85 (R, S)

Stock Graphite Shafts: Project X Denali Frost Silver 60 (R), Project X Denali Frost Silver 70 (S), Mitsubishi Chemical Vanquish 50 (SR)

Stock Grips: Lamkin Crossline Chev Logo Gray/Black Standard 50g, Women’s Lamkin Comfort ST Soft Chev Logo Black/Silver Undersize 44g

Get Fit

2nd Swing offers award-winning club fitting services at each of our store locations and through the 2nd Swing Online Fitting and Support team on 2ndswing.com. Make sure your equipment is fit for your game and schedule your award-winning fitting experience by calling (612) 216-4152 or by visiting the 2nd Swing fitting website: https://www.2ndswing.com/golf-club-fittings.