GHS Electric Boomers® From 1964 to now, the GHS Boomers® series has been the flagship set of GHS Strings. Used by musicians in every genre, the Boomers® have shown to stand up to any playing style. Now known as "The Power String", GHS Boomers® continue to make their mark on music across the world. The roundwound guitar set is made with Nickel-Plated steel wrapped tightly around a round core wire. The combination provides the string with its bright characteristic and long-lasting tone. For nearly 50 years, GHS has been the tone of Rock, Country, Blues, and Bluegrass. Isn't it time you tried on a set?