Project X HZRDUS Smoke Black RDX Wood Shaft blackirons Each Studio Stock Series head MothersDay Each Studio Stock Series head is 100% precision milled from a single block of 303 Stainless Steel in our very own Tinley Park The new progressive tip design of the SteelFiber FC shafts delivers higher ball flight in the mid and long irons while maintaining the classic SteelFiber launch in the scoring irons Smoke Black RDX is the first shaft to utilize Hexcel’s new HexTow® HM54 high modulus carbon fiber and combines it with high tensile strength HexTow® IM2C carbon fiber to provide the ideal blend of stiffness and stability desired by the HZRDUS player Project X has teamed up with Hexcel