Cleartone Monster Electric Guitar Strings - Drop D - 9456 - 11-56 - 2 Packs String gauges: .011, .015, .020, .036, .048, .056 Cleartone Monster Heavy Series sets feature heavier gauge strings for that extra tension you need. Won't flake off with hard playing, nor will it feel slick or slippery to your touch. Package Contains 2 Packs of Cleartone Strings!