Dunlop Rev Willy's Lottery Brand Fine Gauge 8-40 Electric Guitar Strings 3-PackThese Rev. Willy's nickel plated steel electric guitar strings by Dunlop were developed in collaboration with ZZ Top's Billy Gibbons. These are the strings available in several gauges, medium light, fine, and superfine, made in the U. S. A. Dunlop and Billy Gibbons worked together to develop these soulful, rich, articulate and smooth signature string series. These were specifically designed to offer a real punch and still stay articulate and clear