Schaller's new and improved Keystone tuning button They feature vintage original specs along with that classic look and feel: designed to match contemporary as well as historic guitar styles. Replacement machine head with 2-screws and a banjo bolt as counterfort. Single-ring (SR) All sealed tuners are lubricated with Schaller special grease for lifetime maintenance-free service.
All parts are precision-crafted and surface-finished, the self-locking drive ensures an even, delicate and steady tuning. All string posts are made of high-grade brass and fitted into the housing with utmost precision, ensuring the best possible tuning accuracy and wear resistance.