Callaway Quantum Max OS Single Irons - Steel Staff Model Putters Revolutionary Speed Bridge technology strategically

Revolutionary Speed Bridge technology strategically supports the topline of the iron to unlock explosive distance and forgiveness with improved sound and feel

The winged mallet shape is extremely stable

The Original Penguin Insulated Mixed Media Jacket provides Primaloft® insulation

Coupled with a 4° loft sleeve

Big Bertha B21 Hybrids are built for players who want to unlock their inner distance with a total forgiveness package

Callaway Quantum Max OS Single Irons - Steel Staff Model Putters Revolutionary Speed Bridge technology strategicallyQuantum Max OS blends confidence with maximum forgiveness, powerful speed, and consistent carryall in an oversized shape designed to help golfers hit it more solid across the face. 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.