Callaway Quantum Max OS Single Irons - Steel Clubs:4 Iron 7V lithium battery (1800mAh)

7V lithium battery (1800mAh)

from swing to ball flight

Auto advance from hole-to-hole

Upper Side & Lower Back Leg Panels

Binding at the cuffs & hem

Callaway Quantum Max OS Single Irons - Steel Clubs:4 Iron 7V lithium battery (1800mAh)Quantum 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.