Jack's Guitarcheology is an official D'Addario dealer.

From D'Addario:

XL Nickel Wound electric guitar strings are the standard against which all other strings are measured. Our best-selling 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. 10-46 Regular Light strings are our most popular gauge, providing a nice balance of tone and playability.

• XL Nickel are our best-selling electric guitar strings, revered by players since 1974.
• 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 our 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 our exacting specifications at our New York production facility