XL Nickel Wound electric guitar strings are the standard against which all other strings are measured. D'Addario's best-belling electric set, XL Nickel has been revered by players everywhere since 1974. Made with a high carbon steel core and nickel-plated steel wrap wire, XL Nickel strings have a bright, versatile tone, ideal for a wide variety of musical styles. 11-52 Medium Top/Heavy Bottom gauge strings are a hybrid, providing the high strings moderate flexibility, with a booming, tight low-end. Nickel-plated steel wrap wire provides a bright, versatile electric guitar tone, great for a variety of musical genres. Like all D’Addario electric guitar strings, XL Nickel are made with proprietary Hex-Core, ensuring perfect intonation, consistent feel, and reliable durability. XL Nickel sets have a code on the recyclable VCI bag, which you can register to earn Players Circle points. XL Nickel electric guitar strings are made in the USA—drawn to exacting specifications at D'Addario's New York production facility.