Tone playability reliability and quality are what you look for in a good instrument. Why not demand these features from your strings? Ernie Ball strings are made from the finest materials so you get quality and consistency in every set. The specially tempered high carbon steel core wire s hexagonal shape ensures the wrap wire is securely held in place through the length of the string. Precision crafted Swiss brass ball ends are attached with a triple lock twist. Ernie Ball is the pioneer of Rock and Roll guitar strings. Since setting the industry standard for electric guitar strings the list of Slinky users has grown to include the likes of Jimmy Page Eric Clapton Steve Vai and Slash. If you like tone you ll like Slinkys!