Gear ratio 1:16. Stepped buttons. Top locking with fine pitch thread and pull-off locking screw. Vintage look and optimised gear ratio, combined with the legendary quality of the M6 tuner. 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 even, delicate and steady tuning. All string posts are made of high-grade brass and fitted into the housing with utmost precision, ensuring best possible tuning accuracy and wear resistance.