Hand crafted strings made from the finest materials, pure nickel wound. Precision manufactured for 'Puretone Strings' on state-of-the-art string winding machines. The professionals choice. Irish Tenor Banjo String Set, four Finely Crafted, Precision Wound Eagle-Puretone strings with a plain 1st and a Nickel wound 2nd, a Phosphor Bronze wound 3rd and a Phosphor Bronze wound 4th.