Mega heavy round-wound 6 string set for electric guitar that is designed to be a great all-around string set that provides flexibility, great tone and long life, ideal for rock, blues, jazz, heavy metal. Strings are based on round cores made with old construction techniques, wound with round nickel-plated winding. The core wire and wrap wire are the latest, most advanced and expensive metals available. Gauges: .013, .017, .026, .036, .046, .056.