Heavy Core electric guitar strings are ideal for drop tunings. Dunlop uses carefully-selected core wire and proprietary wrap ratios to let you get aggressive with your pick attack, while retaining a tight low end, focused midrange, and smooth high end - whether you're playing clean or distorted. Dunlop makes Heavy Core strings at their Benicia, California factory, and sweats the details throughout the design, manufacturing, and packaging process. Every set of Dunlop strings is packaged with three levels of moisture protection and sealed in a Vapor Corrosion Inhibitor bag. Into drop tunings. Gauge: .010, .013, .017, .028, .038, .048, .060.