D'Addario Balanced Tension guitar sets are comprised of mathematically optimized string gauge combinations, resulting in greater control and playing comfort.011, .015, .019, .028, .037, .050 (BOX OF 10 SETS) D'Addario Balanced Tension 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.