ELECTRIC GUITAR STRING SET D'Addario EXL120BT XL Series Balanced Tension Super Light Electric Guitar String Set (009 - 012 - 015 - 022 - 030 - 040). The D'Addario Balanced Tension XL Electric Guitar Kits are made up of mathematically optimized string gauge combinations, resulting in a performance with greater control and comfort. Combined with the distinctive bright tone of the XL Nickel Wound strings, each set offers greater dynamic control and a more consistent feel between strings for strumming, balanced bendings, picking and other techniques.