Product Description D'Addario EXL220BT Balanced Tension electric guitar sets are comprised of mathematically optimized string gauge combinations, resulting in greater control and playing comfort. Combined with the distinctive bright tone of XL nickel wound strings, each set offers greater dynamic control and a more consistent feel between strings for evenly balanced bending, strumming, fretting, picking, plucking and slapping.XL Nickel Wound, D'Addario's most popular electric guitar strings, are precision wound with nickel-plated steel onto a carefully drawn, hexagonally shaped, high carbon steel core. The result, strings with long lasting, distinctive bright tone and excellent intonation, is ideal for the widest variety of guitars and musical styles. D'Addario, the world's largest manufacturer of musical instrument strings, is known as The Players Choice with a reputation for unsurpassed quality and consistency. D'Addario's innovative, environmentally friendly packaging reduces waste and provides protection from corrosion. All D'Addario strings are manufactured in the U.S.A. using proprietary, digitally controlled, state-of-the-art machinery for unmatched performance, set after set. From the Manufacturer We call it math. You'll call it music.Available for guitar and bass, D’Addario Balanced Tension sets are comprised of mathematically optimized string gauge combinations, resulting in greater control and playing comfort. Combined with the distinctive bright tone of XL nickel wound strings, each set offers greater dynamic control and a more consistent feel between strings. Innovation at your fingertips:Through extensive, detailed, and comprehensive testing, the performance advantages you’ll experience with D’Addario Balanced Tension XL sets over traditional strings are as follows:Based on traditional gauges, but optimized for “balanced tension” between stringsMathematically equalized resistance delivers comparable feel from string to stringEven effort while bending, strumming, plucking and slapping delivers greater dynamic control. More Balance, More Control, More SelectionXL Balanced Tension Sets are available in 3 different options for Bass Guitar: The D'Addario DifferenceYour strings matter. D'Addario's XL Nickel Wound strings are engineered to serve as the critical link between you and your guitar. Our most popular bass guitar strings, XL's are precision wound with highly magnetic nickel-plated steel to exacting specifications, resulting in strings with long lasting, distinctive bright tone, and excellent intonation. Ideal for the widest variety of guitars and musical styles, XL's are the choice of countless professionals around the world. The combination of the most advanced computer-controlled winding technology and stringent incoming wire inspection delivers unmatched consistency, string after string, set after set. Our passion for and commitment to environmentally responsible packaging and raw materials fuels our continued innovation. Every D'Addario string is made in the U.S.A., ensuring the highest quality and performance.