Who’s It For: Golfers who want maximum forgiveness and confidence at address, with an oversized shape that delivers high launch, powerful speed, and consistent carry.
Modern 360° Undercut: Advanced cavity design delivers faster ball speeds, higher launch, and more forgiveness across the face.
Progressive Tri-Sole Design: Promotes cleaner turf interaction and consistent contact from long irons to wedges.
Ai-Optimized Face: Expands the sweet spot for faster speeds and tighter dispersion based on real-world impact patterns.
Urethane Microspheres: Absorb vibration for improved sound and feel, creating a forged-like sensation at impact.
About This Item
Quantum Max OS blends confidence with maximum forgiveness, powerful speed, and consistent carry—all in an oversized shape designed to help golfers hit it more solid across the face.
Modern 360° Undercut
The Modern 360° Undercut Cavity is designed to deliver faster ball speeds, higher launch, and more forgiveness across the face, thanks to its advanced two-piece design with extreme perimeter weighting and a fully exposed undercut for added flex where golfers need it most.
Progressive Tri-Sole Design
The Progressive Tri-Sole Design promotes cleaner, more consistent contact across the set, with a reengineered sole geometry that adapts from long irons to wedges for smooth turf interaction and efficient speed retention—even on heavy strikes
Next Generation Ai-Optimized Face Design
The Next Generation AI-Optimized Face delivers faster ball speeds and more consistent launch, spin, and dispersion by intelligently shaping the face to match real-world impact patterns and expand the sweet spot.
Urethane Microspheres
Urethane Microspheres enhance sound and feel at impact by absorbing unwanted vibration, delivering a softer, forged-like sensation in a high-speed game-improvement head.
Oversized, Confidence-Inspiring Shape
Quantum Max OS is built for higher launch and maximum forgiveness—all in an oversized shape that inspires confidence at address.
Brand : Callaway
Country of Origin : Imported
Web ID: 25CALMGOLFQNTMMXSSELQ
Club
Loft
Loft
Lie
Length
Offset (mm)
4
19.0°
21.0°
60.375°
39.125"
6.35
5
22.0°
24.0°
61.00°
38.50"
5.89
6
25.0°
27.0°
61.625°
37.875"
5.41
7
29.0°
31.0°
62.25°
37.25"
4.80
8
33.0°
35.0°
62.875°
36.625"
4.19
9
37.0°
39.0°
63.50°
36.00"
3.56
PW
42.0°
44.0°
63.75°
35.75"
2.79
AW
47.0°
49.0°
64.00°
35.50"
2.21
GW
51.0°
53.0°
64.00°
35.50"
1.65
SW
55.0°
57.0°
64.00°
35.25"
1.12
REVIEWS
4.9
100%
Recommended
245 Reviews
JamesT
1 day ago
New Irons
Replaced paradym irons and am very pleased with the change. A bit heavier but more forgiving.
Jayhawk08
2 days ago
Quantum
I love the Quantum. Long, straight and high. I’ll be even happier if my trade-in money is processed.
Art7709
2 days ago
Great 5i
Im not a very strong hotter but the fact i can get the distance of my 3 wood on this 5iron is just what i needed since i constantly hit down im more consistent with my irons love the feel
jeffmo
Received incentive
2 days ago
Quantum Iron Upgrade
I bought this a moth ago after using the Callaway club selector tool replacing a 12 year old club. I am hitting at least 10-20 yards further with the 7 iron. Great advice and purchase
SmiggyB
2 days ago
Great Irons, Questionable Company.
The product is excellent, I am not sure that my faith in the company will remain as strong as it has been in the past. Throwing a group of creators under the bus for an ad that was Callaway approved seems in bad taste. I will look to purchase from a different company when the time comes.
mOpAr52
2 days ago
Quality
I just bought this Sand Wedge to complete my iron set and very happy with it and the 4 thu 9 irons. Quality craftmanship. I recommend it.
Slicer 2
4 days ago
Disappointed!
I returned them! They were 20 to 30 yards shorter than the 2023 Big Bertha iron set that I traded in! Wish that I had kept the Big Bertha!
ThumbsRSH
1 week ago
Too Good!?! Probably The Best Clubs For You.
I am returning to golf as a high-handicap player after about 25 years away. For reference, my swing, to the untrained eye, probably looks decent. I've always had good club speed, can still hit my driver almost 300 yards on rare occasion, regularly hit it in the mid 270's as a 57 year old. Not very accurate at that distance though which brings me to Quantum Max OS irons.
There are a LOT of reviewers out there doing all sorts of club tests and giving their OPINIONS on clubs. Only a few really use the data available and only Golf Digest seems to have the robot data available. Sure a pro can hit fairly repeatable shots. The robot can hit "perfectly" repeated shots and Golf Digest tests clubs by having it hit 54(?) shots with each club, six shots from each of 9 areas on the face. This gives incredible data for how forgiving a club is of mis-hits. I bought these because they are among the very best, of all clubs tested including SGI, GI, PA, and Tour irons. Perhaps the best for a non-pro of any level if your goal is to consistently hit the ball to a target. Some folks may argue that these clubs can't control the ball as well as more costly clubs- beats me as that is not my level of game yet. What they do better than any other is send the ball roughly where you want it to go when the ball doesn't meet the club in the sweet spot.
That fact makes improving your game SO much easier. Improving your game/swing for most of us means learning to not mis-hit as often, then learning to get close to the sweet spot more often. That process involves a lot of time and mis-hit balls. Mis-hits are fine at the range. There could even be an argument for using really unforgiving clubs at the range because they will expose all of your flaws. No thanks.
Mis-hits on the course really suck, especially courses with lots of trees and brush to gobble up wayward shots. Because these clubs are SO much more consistent across the entire face, your mis-hits will be far more likely to be in the "that will play" zone instead of "hit a Mulligan, that ball is lost" zone.
At the range today I finally started working on my technique in earnest after many sessions of just having fun hitting the balls. My shot grouping on TopTracer was very satisfying. It's a large oval because my range still varies a lot but the oval is long and skinny, with the long axis lining up with the pin and the side-to-side pretty darn narrow. Example: Approach wedge, swinging easy, had a total width of the oval of about 11 yards (max about 5L, 6R) at about 80 yards total distance. For a very high handicap player, that is exciting. Obviously, some of it is my ability but there is no mistaking the importance these clubs make. Don't believe me? Look at what Rory McElroy said about the equipment becoming too good.
Jbone
Received incentive
1 week ago
Exactly As Advertised!
I’ve played them for 3 rounds and These clubs preform just as described more distance and very forgiving. Love the feel, response, and overall game changing effect. Definitely the clubs for the higher handicaps. So happy with this decision, went from the X-18’s and won’t look back!
Callaway makes top quality equipment and great warranty. You can’t beat Callaway’s trade in program.
Customer for life!
Gilbertlee
Received incentive
1 week ago
I bought for the second time and used 2X trade in. Bought more than I planned on. Simon was great.
Djbeef28
Received incentive
1 week ago
Quantum Irons
The Quantum max OS irons have exceeded my expectations. Well worth the price.
BIG FRANKIE
Received incentive
1 week ago
Game Improvement Irons
GREAT IRONS. I bought these Irons 3 weeks ago. I did not go to the range with them. I played in a tournament last weekend and they were great. Should have bought them when the first came out.
Jswain
Received incentive
1 week ago
Great Club, Poor Quality Control
The clubs are amazing. The lofts were 100%wrong. Not one club was correct. They sent me all new irons and those lofts were correct except for one club so they made it right and did it quickly.
Goldy
Received incentive
2 weeks ago
So Easy To Hit These Irons
I have only played a few rounds since purchasing these. Very happy with the results. Have now purchased the 4 and 5 hybrids. Can’t wait to try them.
ChrisR
2 weeks ago
The Early Results Are In!!
I have used this club a few times and it feels great. The sound and feel of the ball strike gives you a boost in your mental state. I can’t say I hit the ball any better or further yet. I will say after each hit I want to hit three more so I can keep the feeling of my shot with this club in my hand. I believe I will have to try out more of these clubs.