DRAGON SKIN* Electric Guitar Strings feature DR’s K3* clear coating on a nickel-plated steel wrap wire to prevent dirt and perspiration from reaching the round core wire, preventing corrosion. The K3* coating, which is applied to all strings in the set, is ultra-hard and doesn’t dampen vibration like softer coatings can. The strings have more projection, fewer unwanted overtones, greater clarity and articulation than uncoated strings.