ELECTRIC GUITAR STRINGS SET Set of 3 sets of Electric Strings for XL Series Nickel Wound Electric Guitar, 11-52 (011 - 014 - 018 - 030 - 042 - 052). D Addario XL Strings for Electric Guitars have been recognized worldwide as The Guitarist's Choice among guitarists of all genres and styles. XL strings are wound with great precision with nickel plated steel onto a hexagonal shaped core, resulting in strings with a distinctive, brilliant tone and excellent intonation.