Ernie Ball Cobalt Slinky Electric Guitar Strings boast an extended dynamic range, excellent harmonic response, impressive low end, and crisp, clear highs. The cobalt used in making the strings provides a stronger magnetic relationship between pickups and strings than any other alloy previously available. Cobalt Slinky guitar strings are also soft and silky to the touch, making string bending a smooth easy. Gauges .010, .013, .017, .026, .036, .046