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. Every set of Dunlop Strings come packaged utilizing three levels of moisture protection and sealed in a VCI Fresh Technology (Vapor Corrosion Inhibitor) bag to guarantee that your strings arrive as fresh as the day they were made.