These deluxe 3-on-plate tuners are direct-replacement steel-string tuners with vintage-style stamped plates and white plastic knobs. These are perfect when those tired original tuners on older guitars finally give out! 15:1 ratio Fit 11/32"-diameter pegholes Press-fit bushings (6) and mounting screws (8) included Set of 6 (3 left, 3 right) Nickel-plated with white plastic knobs Installation Tips - Bushings: We recommend a .340" diameter reamer to cut a clean, accurate counterbore for the bushings. Fit the press-fit tuner bushings correctly so your tuners will work smoothly. Mounting screws: Pilot holes are required for the mounting screws. Installing delicate screws into hard wood requires great care and accuracy. We highly recommend a No.44 drill 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.