Ernie Ball strings have been a top choice for players of all types since the early 1960s, when guitarists came into Ernie Ball's music store, customizing their string gauges to make their axes easier to play. After fruitless attempts to interest major guitar manufacturers in a lighter set of strings, Ernie Ball decided to start making his own. From shredders to acoustic virtuosos, guitarists love Ernie Ball strings for their great tone, reliable performance, and long life. You can't go wrong when you string up with Ernie Ball strings! Ernie's Medium Light Earthwood 80/20 Bronze strings are made from 80% copper, 20% zinc wire wrapped around hex-shaped tin plated steel core wire. They provide a crisp, ringing sound with pleasing overtones.