" 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 forgivenessbr AMP Cell technology Distributes weight from the face and body to create perimeter weighting and positions CG behind the Sweet Zonebr V-skid sole design Sculpted sole configuration that improves turf interaction for all swing types br Cobra Amp Cell Men's Blue Iron Set Right Hand Steel Stiff 4-GW"