Regular Electric Guitar String Tone Pack. A perfect way for players to experience three legendary electric guitar tones. Contains one set each of Regular Original Slinky, Cobalt Slinky and M-Steel Slinky strings, Original Slinky strings, featuring classic, balanced tone, Cobalt Slinky Strings, providing higher output and superior clarity, M-Steel Slinky Strings, which are the loudest, most expressive strings ever created.