Schaller Banjo B4 CH, single tuner for banjo, Schaller Item No: 10410100.75.72, 5-wheel planetary gear with central drive, Locking mechanism built into the button, 1 pieces, constellation:, construction: closed type, button: B4 Pearloid, gear ratio: 1:4, shaft length: 22,5 mm (0,89"), bore: 9,9 mm (0,39"), finish: chrome, made in Germany