» Steel wire-frame head construction with light aluminum core pushes increased weight to the perimeter, boosting MOI to promote remarkably consistent distance on off-center hits » Movable Weight Technology® (MWT) allows substantial weight to be concentrated in areas far from the face, shifting the center of gravity far rearward for increased MOI and stability » AGSI®+ Technology insert with 14 tightly positioned grooves promotes more efficient forward spin for a smoother roll