Callaway Quantum Max OS HL Irons 2026 – Steel OR Graphite

Featuring the largest and most forgiving Quantum head shape and weaker lofts than the standard OS set, the Quantum Max OS HL is built for players who benefit from an exceptionally high launch, maximum speed, and consistency.

The technology backing the performance-packed Max OS HL begins with its 360° Undercut Cavity, including an advanced two-piece construction with extreme perimeter weighting and a fully exposed undercut. By positioning mass at the edges of the clubhead, the perimeter weighting generates exceptional stability. At the same time, the undercut allows for a faster, more flexible face, delivering extraordinary speed, forgiveness, and launch across the hitting surface.

The high launch, super game-improvement category is full of speed, launch, and forgiveness-focused offerings. Yet, unlike most of its competition, the Max OS HL mimics the soft, rewarding impact sensation typically reserved for forged irons, thanks to Callaway’s proprietary Urethane Microspheres.

The final element in Callaway’s Max OS formula is its re-engineered Tri-Sole design. From long irons to wedges, the sole’s updated progressive shaping ensures a smooth entry and exit through the turf, promoting consistent contact in all course conditions.

Callaway Quantum Max OS Irons Feature:

• Oversized head shape with a thicker topline, longer blade length, and a wider sole with weaker lofts for maximum speed and forgiveness with an even higher launch than the standard Max OS
• Modern 360° Undercut Cavity delivers faster ball speeds, a higher launch, and more forgiveness across the face
• Next Generation Ai-Optimized Face design intelligently shapes the face to enhance speed, expand the sweet spot, and promote more consistent launch, spin, and dispersion
• Progressive Tri-Sole Design promotes smooth turf interaction for cleaner, more consistent contact across the set, even on heavy strikes
• 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
• Stock Steel Shaft: True Temper Elevate 85
• Stock Graphite Shafts: Mitsubishi Vanquish PL, Project X Denali Frost Silver
• Stock Grip: Lamkin Crossline 360