Ernie Ball Slinky Electric Strings are favored by many musicians around the globe. Slinky strings are played by Eric Clapton, John Mayer, Steve Vai and legions of guitar players worldwide. These strings are precision manufactured to the highest standards and most exacting specifications to ensure consistency, optimum performance, and long life. Slinky wound strings are made from nickel plated steel wire wrapped around a hex shaped steel core wire. The plain strings are made of specially tempered tin plated high carbon steel; producing a well balanced tone for your guitar.