Callaway Quantum Max Fast Women’s Iron Set (5 Clubs: 7–P, S) – SPDSTAR 40 for Callaway LDY Graphite Shaft

Advanced Technology for Distance, Forgiveness, and Ideal Iron Shots

The Quantum iron series was developed with a focus on common impact errors often seen among average golfers. While continuing to utilize AI-designed models optimized for each model and club number, a new 360° undercut structure has been introduced. The head features a cross-section shaped like the letter “J”.

By positioning the face weld point farther back from the face, the design allows the face to flex across a wider area—even on typical miss-hits such as strikes low on the face or toward the toe. This helps produce a higher launch angle and increases the chances of landing the ball on the green.

The irons also incorporate urethane microspheres, delivering a high-quality sound and soft feel at impact.

A newly designed Tri-Sole improves turf interaction, helping the club glide smoothly through the ground and reducing digging in a variety of impact conditions.

In addition, AI-engineered face design continues to be used, further strengthening control points and significantly enhancing trajectory correction.

The new Quantum Max Fast Women’s Iron model is designed specifically for female golfers. While featuring a slightly larger head shape for confidence at address, the clubs are made lightweight by using a fully original 40g-class shaft and reducing the amount of urethane microspheres and tungsten weighting. The higher loft configuration also makes it especially easy to launch the ball.