ELECTRIC GUITAR STRING SET D'Addario NYXL0942 Electric Guitar String Sets (009 - 011-016 - 024 - 032 - 042). D'Addario NYXL guitar strings stretch more, sound louder, and tune better than any string you've ever played before. Conceived, refined, and manufactured by D'Addario in New York, this newly designed, tear resistant, high carbon steel and smooth steel core provides a new level of freedom, confidence and power.