Power-Brights are the ultimate strings for rock guitar. Medium-light top combined with heavy bottom strings forces the instrument to sustain. The plain strings are made of highly flexible steel with brass coating to prevent corrosion. The wound strings have a hexagonal core for greater flexibility and a special Magnecore alloy winding for high output. Gauges: .010 -.013 - .018 - .028 - .0452 - .050.