No, we didn't hire a rapper. These are our new Muscle-Cavity back Irons! Made out of S25 carbon steel, the milling on the face allows for better spin and ball control, while the muscle-cavity back combination gives it the playability of a tour blade while maintaining the forgiveness of a cavity back. Only 10 sets made in this first run. Available for $1200, with Rifle, Dynamic Gold, or KBS Tour shafts and Golf Pride grips.