D'Addario EXL120BT Balanced Tension electric guitar strings consist of mathematically optimized combinations of string gauges that lead to greater control and playing comfort. Combined with the characteristic bright tone of XL nickel-plated strings, each set offers improved dynamic control and a more consistent feel across the strings for evenly balanced bending, picking, fretting, and strumming. XL Nickel Wound, D'Addario's most popular electric guitar strings, are precisely wound with nickel-plated steel around a carefully drawn, hexagonally shaped high-carbon steel core. The result is strings with a long-lasting, signature bright sound and excellent intonation, ideal for a variety of guitars and music styles. The Balanced Tension sets allow for evenly balanced bending, picking, fretting, and strumming. Round wound with nickel-plated steel for a characteristic bright tone. Eco-friendly, corrosion-resistant packaging ensures that the strings stay fresh. Made in the USA for the highest quality and performance. String gauges: Plain Steel .009, .012, .015, Nickel Wound .022, .030, .040.