Dunlop Heavy Core electric guitar strings are made with great pride in Benicia, California and specially designed for the player that plays in dropped or lowered tunings. Our Heavy Core strings incorporate a unique core wire and proprietary wrap ratios to offer players the ability to really "dig in" while retaining a tight low end, focused midrange and smooth top-end when playing clean or distorted. Gauges: .010, .013, .017, .028, .038, .048