Tuning machine for Banjo. 5-wheel planetary gear. Locking mechanism built into the button. Central planetary drive. Gear ratio 1:4.. 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. Price per single tuner. Features: Model: Planetary Gears, Model: Banjo Bolt, Buttons: Perloid, Surface: Nickel, Ratio: 1 : 4, Weight g/item: 37, Bore mm: 9.9