Sheptone Premium Nickel Wound Electric Guitar Strings are designed for players wanting to achieve the tone of their dreams. Sheptone strings are made on a U.S. workbench using the best-available, domestically sourced raw materials that ensures the tone, feel,and durability required for the best string, right out the package.Each Sheptone string is made by hand, one at a time, with nickel-plated steel that's carefully wrapped around a treated hex steel core. For over a decade, Sheptone has been an industry secret for one thing and one thing only��tone. Sheptone Premium Nickel Wound Electric Guitar Strings represent the next phase of that tradition.