The Ernie Ball Power Slinky Strings are a perfect match for those electric guitar players who like the sounds of rock & roll or blues. Favored by Slash Metallica & Kenny Wayne Shepherd the thicker gauge combination produces some real power. They are manufactured to the highest standards to ensure quality optimum performance and longevity. The wound strings are made from nickel plated steel wire that is wrapped around a hex shaped steel core wire. This ensures a well balanced tone when playing.