Modern 360 ° Undercut CavityAt the core of the Quantum Max OS is Callaway’s Modern 360 ° Undercut Cavity. This advanced two-piece construction uses extreme perimeter weighting and a fully exposed undercut to increase face flex where golfers need it most. The design delivers faster ball speeds, higher launch, and increased forgiveness across the face, particularly on strikes that miss the centre.Next Generation Ai-Optimised Face DesignThe Next Generation Ai-Optimised Face intelligently shapes face geometry based on real-world impact patterns. By expanding the effective sweet spot, it produces more consistent ball speed, launch, and spin, helping shots carry more predictably and reducing distance loss on off-centre strikes.Progressive Tri-Sole DesignThe Progressive Tri-Sole Design adapts sole geometry throughout the set to promote cleaner turf interaction and efficient speed retention. Wider soles in the long irons help get the ball airborne more easily, while progressively refined soles in the mid and short irons improve control and consistency through impact, even on heavier strikes.Urethane MicrospheresUrethane Microspheres are integrated into the head to absorb unwanted vibration at impact. This refines sound and feel, delivering a softer, more forged-like sensation despite the high-speed, game-improvement construction of the iron.Oversized, Confidence-Inspiring ShapeQuantum Max OS features a generous profile designed to inspire confidence at address. The oversized shape supports higher launch and maximum forgiveness, helping golfers commit to the swing and make more consistent contact throughout the set.On-Course PerformanceOn the course, the Quantum Max OS irons produce a high, stable launch with strong carry and controlled spin. Long irons are noticeably easier to elevate, while mid and short irons provide dependable distance control into the greens. Off-centre strikes retain ball speed and direction more effectively than expected, helping maintain scoring opportunities even when contact quality varies.Who It SuitsThe Quantum Max OS irons are ideal for golfers seeking the highest level of forgiveness and easy launch in the Quantum range. They suit players who want help striking the ball more consistently, benefit from an oversized profile, or prioritise confidence and reliability over compact shaping or workability.Specifications Club Loft HL Spec Lie Length Offset Dexterity 4 18 ° 20 ° 60.375 ° 39.125” 6.35mm RH/LH 5 21 ° 23 ° 61.0 ° 38.5” 5.89mm RH/LH 6 24 ° 26 ° 61.625 ° 37.875” 5.41mm RH/LH 7 28 ° 30 ° 62.25 ° 37.25” 4.80mm RH/LH 8 32 ° 34 ° 62.875 ° 36.625” 4.19mm RH/LH 9 36 ° 38 ° 63.5 ° 36.0” 3.56mm RH/LH PW 41 ° 43 ° 63.75 ° 35.75” 2.79mm RH/LH AW 46 ° 48 ° 64.0 ° 35.5” 2.21mm RH/LH GW 50 ° 52 ° 64.0 ° 35.5” 1.65mm RH/LH SW 55 ° 57 ° 64.0 ° 35.25” 1.12mm RH/LH
