Product Description BLACK BEAUTIES™ Black Colored Electric Guitar Strings aren’t just about the sleek and sophisticated look. They feature a hexagonal core wire and a nickel-plated steel wrap wire to maintain brightness and feel. All strings in the set are coated with a jet-black version of DR’s K3™ ultra-hard coating, delivering longevity, more projection, fewer unwanted overtones, and outstanding clarity and articulation. From the Manufacturer RED DEVILS™ Red Colored Electric Guitar Strings aren’t for the timid. With hexagonal core wires and silver-plated nickel-plated steel wrap wires, their loud and aggressive sound compliments their vibrant color. All strings in the set are coated with a red-colored version of DR’s proprietary K3™ coating, which delivers longevity, more projection, fewer unwanted overtones, and outstanding clarity and articulation.