D'Addario EXL140 Nickel Wound Electric Guitar Strings, Light Top/Heavy Bottom 10-52 EXL140 is one of D'Addario's most popular hybrid sets, combining the high strings from an EXL110 (.010) with heavier low strings (.052). This combination delivers powerful low end for heavy chording and flexible plain steel strings for bending. Optimized for down or drop tuning! D'Addario XL Electric Guitar strings are world-renowned amongst guitar players of all genres and styles. XL strings are wound with nickelplated steel and are known for their distinctive bright tone and excellent intonation. String Gauges: Plain Steel .010, .013 .017, Nickel Wound .030, .042, .052