A new iron that utilizes Fusion® Technology — the innovative weight distribution technology created by Callaway Golf — the Fusion Wide Sole Irons use advanced multi-material design to create an oversized game-improvement iron. Three materials are brought together to create the Fusion Wide Sole Irons: A dense alloy, Tunite™, is fused into the sole, optimally placing the center of gravity low in the clubhead. Lightweight 6-4 titanium is used to form the body. A special vibration-dampening TPU SenSert™ insert is used in the back cavity to generate exceptional feel.