Callaway Quantum Max OS Ladies Irons (Graphite)
The Callaway Quantum Max OS are super game improvement irons in an oversized shape, designed to deliver maximum confidence at address, a higher launch, and above all the greatest forgiveness across the entire Quantum range. The goal is straightforward: strike the ball more cleanly across the face, maintain consistent carry distances, and improve overall shot-making consistency. Whether you are returning to the game or looking to get more from every swing, the Quantum Max OS is engineered to help ladies golfers hit it better, more often.
Key Features
- Oversized, confidence-inspiring head shape — larger profile promotes a higher launch and maximum forgiveness at impact.
- Ball speed and consistent carry — the entire design concept is focused on fast ball speed and stable distances across the set.
- Modern 360° Undercut Cavity — two-piece construction with prominent perimeter weighting and a fully open undercut for more flex and faster ball speeds.
- Progressive Tri-Sole Design — sole geometry tuned progressively from long irons to wedges for cleaner turf interaction.
- Next Generation Ai-Optimized Face Design — AI-shaped face modelled on real impact data, expanding the sweet spot across the face.
- Urethane Microspheres — damp unwanted vibrations for a softer, forged-like feel and improved sound at impact.
- Mitsubishi Eldio White 40 graphite shaft — ultra-lightweight Ladies flex shaft optimised for smooth tempo and effortless launch.
- Available right-hand and left-hand — sold as individual irons or as complete sets (5P, 6P, 6PA, 6PS configurations).
Technology in Detail
Oversized, Confidence-Inspiring Shape
The Quantum Max OS head is specifically engineered in an oversized format to make alignment and setup feel reassuring at address. A larger clubhead naturally promotes a higher launch angle and delivers the maximum forgiveness available within the Quantum iron family. Callaway has purposely made this the most forgiving iron in the Quantum lineup — giving every player the best chance of striking the ball solidly, even on off-centre hits. The look at address communicates stability, encouraging a more committed, confident swing on every shot.
Ball Speed and Consistent Carry
The Quantum Max OS is built around one core principle: generate fast, reliable ball speed on every swing. By combining an oversized head with refined internal weighting and a highly flexible face structure, the iron produces ball speeds that translate directly into consistent carry distances across the entire set. This means less variation between your best strikes and mishits — giving you the confidence to commit to a club knowing the distance will hold up. For ladies golfers who want to see genuine improvement in how far and how consistently they carry the ball, the Quantum Max OS delivers.
Modern 360° Undercut Cavity
The Quantum Max OS features a modern two-piece construction with a fully open 360° undercut cavity and pronounced perimeter weighting. This design moves mass to the perimeter of the clubhead, dramatically increasing the moment of inertia (MOI) and reducing the effect of off-centre strikes. The fully open undercut creates additional flex in the face precisely where players need it most, increasing ball speed, launching the ball higher, and providing more forgiveness across the entire hitting area. The result is a set of irons that feels significantly more stable through impact than a conventional cavity back design.
Progressive Tri-Sole Design
The sole geometry of the Quantum Max OS is progressively tuned across the set — from the long irons through to the wedges. Each iron in the set features a sole shape specifically adapted to the demands of that particular club, ensuring cleaner, more consistent contact with the turf regardless of lie or swing style. This progressively designed sole promotes smooth turf interaction and helps prevent the club from digging into the ground, even on heavier, more aggressive strikes. The end result is more consistent ball striking with better energy transfer to the ball.
Next Generation Ai-Optimized Face Design
Callaway has used artificial intelligence to shape the face of the Quantum Max OS based on real-world impact data gathered from thousands of actual swings. The AI analyses where players typically strike the ball across the face and optimises the face thickness and geometry accordingly — enlarging the effective sweet spot and delivering more consistent launch angle, spin, and direction even on impacts away from the ideal centre. This next-generation Ai-Optimized Face Design means that a slightly mishit shot flies more like a well-struck one, giving ladies golfers greater confidence and better results across a wider range of contact points.
Urethane Microspheres
To counterbalance the high-speed performance and the stiffness inherent in a game improvement iron construction, Callaway has incorporated Urethane Microspheres into the Quantum Max OS. These microscopic urethane spheres are strategically placed within the cavity to absorb unwanted high-frequency vibrations at impact. The result is a sound and feel at the moment of contact that is noticeably softer and more refined — often described as forged-like — without compromising the ball speed or distance performance of the club. This gives players both the performance of a modern game improvement iron and the satisfying feel typically associated with more premium forged designs.
Shaft
Mitsubishi Chemical Eldio White 40 — Graphite shaft, Ladies flex (40 g). The Eldio White 40 is an ultra-lightweight graphite shaft specifically designed for ladies golfers, promoting a smooth, effortless swing tempo and a naturally high launch trajectory that maximises carry distance.
Grip
Lamkin ST Soft Womens grip — a ladies-specific grip offering a softer feel and a slimmer profile, providing excellent feedback and secure hold throughout the swing.
Specifications
| 4 | 5 | 6 | 7 | 8 | 9 | PW | AW | GW | SW |
| Loft | 19° | 22° | 25° | 29° | 33° | 37° | 42° | 47° | 51° | 55° |
| HL Loft (custom) | 21° | 24° | 27° | 31° | 35° | 39° | 44° | 49° | 53° | 57° |
| Lie | 60.375° | 61° | 61.625° | 62.25° | 62.875° | 63.5° | 63.75° | 64° | 64° | 64° |
| Length | 38.125" | 37.5" | 36.875" | 36.25" | 35.625" | 35" | 34.75" | 34.5" | 34.5" | 34.25" |
| Offset (mm) | 6.35 | 5.89 | 5.41 | 4.8 | 4.19 | 3.56 | 2.79 | 2.21 | 1.65 | 1.12 |
| Hand | RH / LH | RH / LH | RH / LH | RH / LH | RH / LH | RH / LH | RH / LH | RH / LH | RH / LH | RH / LH |
RH = Right Hand, LH = Left Hand.
Available Set Configurations
The Callaway Quantum Max OS ladies irons are available as individual clubs or as complete sets in the following configurations:
- 5P (6 irons): 5, 6, 7, 8, 9, PW
- 6P (5 irons): 6, 7, 8, 9, PW
- 6PA (6 irons): 6, 7, 8, 9, PW, AW
- 6PS (6 irons): 6, 7, 8, 9, PW, SW
- Individual clubs: 5, 6, 7, 8, 9, PW, AW, GW, SW
Shaft — Mitsubishi Eldio White 40
Flex: Ladies
Weight: 40 g
Material: Graphite
Brand: Mitsubishi Chemical
The Callaway Quantum Max OS ladies irons are available in both right-hand (RH) and left-hand (LH) versions. Individual irons and full set configurations are in stock. If you are unsure which set configuration suits your game, our team is happy to advise.
