Ernie Ball Super Slinky strings are some of the most popular electric guitar strings of all time. They offer a balanced sound that's neither bright, nor too dark. With gauges 9-42, Super Slinky strings very easy to fret and bend. They're extremely popular with guitarists who love to solo, including Jeff Back. While they're officially referred to as Nickel Wound, it's actually a nickel-plated steel wrap around a tin-plated hex steel core.