Rogue ST Pro Irons are Callaway’s fastest players irons ever. They’re designed using hollow body construction to deliver the look and feel of a players performance iron, with the distance and forgiveness of a game improvement iron. For the first time in the industry, they’ve combined high strength 450 steel with our A.I. designed Flash Face Cup. This delivers more ball speed and better ball speed consistency. They’ve applied their new A.I. Face Optimization to Rogue ST Pro. It’s unique for each model and loft to create spin rate consistency across the face. This delivers high launch and COR and a more controlled landing angle to help hold greens. Their new precision tungsten weighting features up to 48g of high-density tungsten, a 188% increase over MAVRIK. This provides improved launch conditions and maximizes speed across the face. Their patented urethane microspheres are now pushed further up the face in Rogue ST irons (up to the 6th groove) to enhance sound and deliver pure feel while maintaining fast ball speeds.