Roundwound Nickel-Plated Steel Passion Power and Performance. The Dynamite Alloy Boomers continue to be the standard to play by. The bright long-lasting tone continues to be THE power string. Extra core strength provides durability while the nickel plating babies your frets. GHS strings are the music industry s choice whether you want a fat bright tone or a bluesy warm & mellow tone. Before they leave the shop each string is meticulously inspected by hand by quality assurance people. Gauges: DYB50; DYB70; DYB95; DYB115