These are geared for players seeking a solid, game-improvement iron that combines forgiveness, performance and styling. Like other Callaway irons, these feature the proven S2H2, Tru-Bore and VFT (Variable Face Thickness) technologies, as well as a constant-width sole. Extreme Notch Weighting allows mass to be moved to the clubhead perimeter -- mainly to the heel and toe -- for more forgiveness and distance on off-center hits. The deeper 360-degree undercut channel further maximizes the benefits of perimeter weighting by enhancing the clubhead's stability and resistance to twisting. These come in men's and women's models, with choice of Royal Precision MicroTaper 110-gram steel uniflex shafts or Callaway's graphite shafts. They sport a polished-chrome finish with red and black accents.