6 string set for drop D tuning for electric guitar from Heavy series with heavy duty construction and enhanced core-to-wrap ratios, designed to be more powerful in every way and handled even by very hard playing guitarist. All strings are treated with very thin Volume BOOST coating that makes them 10% louder than uncoated sets and 36% louder than most of the coated sets. Coating also extends the life of each string, while Tune LOCK technology keeps the strings sounding brand-new up to 5 times longer. Strings are made with hexagonal steel core with nickel-plated steel winding. Gauges: .011, .015, .020, .036, .048, .056