Custom ‘Heavy Weight’ 6 string set for electric guitar from Boomers series that used to be a signature set of Zakk Wylde, former guitarist for Ozzy Osbourne. This set has an extremely heavy bottom and great for tuning down as low as C. Strings are made with hexagonal steel core and durable, round nickel-plated steel (NPS) winding, and deliver bright, long-lasting tone and long lifespan. Gauges: .011, .014, .018, .036w, .052, .070.