D'Addario EXL115BT Nickel Wound Electric Guitar Strings, Balanced Tension Medium 11-50 D'Addario EXL115BT 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, and plucking. Round wound with nickelplated steel for distinctive bright tone String Gauges: Plain Steel .011, .015, .019, Nickel Wound .028, .037, .050