Ernie Ball Cobalt Slinky Electric Guitar Strings provide an
  extended dynamic range, incredible harmonic response, increased
  low end, and crisp, clear highs. Cobalt 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 breeze.
  Gauges .012, .016, .024, .032, .044, .056