D'Addario XL Electric Guitar strings are world-renowned as "The Player's Choice" amongst guitar players of all genres and styles. XL strings are wound with nickelplated steel and are known for their distinctive bright tone and excellent intonation. Our plus gauges offer a slight variation in tension between gauges. These are ideal for equalizing tension between guitars of varying scale lengths or if you're looking to jump to heavier gauges in small increments..