High quality classical guitar tuning machines with smooth tuning and removable knobs; their elegantly simple polished unplated brass baseplates have an incised vine motif.Details:Complete set of 3-onplate tuners for nylon-string classic guitars with slotted peghe ad 14:1 gear ratio 35mm (1-3/8") string roller spacing The string roller sleeves are durable 3/8"-diameter white plastic Unplated brass baseplates, with pearloid knobs Each set includes a pair of 3-left/3-right tuning machines with 8 mounting screwsInstallation TipMounting screws: Pilot holes required. Installing delicate screws into hard wood requires great care and accuracy. We highly recommend a No. 50 bit for the pilot hole before installing these screws. Lubricate the screw threads with cutting lubricant (also wax or a bar of soap) to reduce friction and help them thread properly. High quality classical guitar tuning machines with smooth tuning and removable knobs Complete set of 3-onplate tuners for nylon-string classic guitars with slotted peghead 14:1 gear ratio Unplated brass baseplates, with pearloid knobs Each set includes a pair of 3-left/3-right tuning machines with 8 mounting screws High quality classical guitar tuning machines with smooth tuning and removable knobs Complete set of 3-onplate tuners for nylon-string classic guitars with slotted peghead 14:1 gear ratio Unplated brass baseplates, with pearloid knobs Each set includes a pair of 3-left/3-right tuning machines with 8 mounting screws