"http://www.amazon.com/gp/product/B00A7401NA?tag=httpadvance00-20 Metal wood face-weld construction with E9 Face Technology Creates a high COR zone and controls weighting with a lighter high-strength face for explosive distance and forgiveness AMP Cell technology Distributes weight from the face and body to create perimeter weighting and positions CG behind the Sweet Zone V-skid sole design Sculpted sole configuration that improves turf interaction for all swing types Cobra Amp Cell Men's Blue Iron Set Right Hand Steel Stiff 4-GW"
