XL Nickel-Wound, D'Addario's most popular electric guitar strings, are precisely wound with nickel-plated steel around a carefully shaped hexagonal high-carbon steel core. The result is strings with a long-lasting, characteristic bright tone and excellent intonation, ideal for a variety of guitars and music styles. D'Addario offers a complete range of electric guitar singles for all your replacement or customization needs. .054 gauge nickel-plated electric guitar string. Round wound with nickel-plated steel for a characteristic bright tone. Perfect as a replacement string or for creating custom sets. Made in the USA for the highest quality and performance.