Callaway Golf RAZR X Black Irons Set RAZR Technology shifts the center of gravity lower and deeper by redistributing weight in the back cavity; providing the power and forgiveness of a wide-sole iron with the precision and playability of a thin-sole iron. Fully integrated clubface/undercut cavity system that enables our engineers to precisely position the CG and engineer the face of each individual iron to maximize ball speed. The longer hosel provides a more conventional look that inspires confidence. Black PVD Finish Physical Vapor Deposition Finish comes from a high-tech process that produces a distinctive look for reduced glare and strong appeal in the bag. Multi-Material Medallion Constructed of aluminum and thermoplastic polyurethane, it fine-tunes sound and enhances feel off the clubface. Customized Set Options Golfers who struggle hitting long irons can increase distance and forgiveness by substituting RAZR X HL Hybrids into their set where their confidence and consistency start to drop off.