6) Tuner conversion bushings nickel to mount vintage style tuners in 10mm headstock holes
8mm Vintage Guitar Machine Head Tuning Peg Tuner Bushings Adapter Ferrules Guitar Parts For Installing Vintage Tuning Keys - Guitar Parts & Accessories - AliExpress
Fender American Vintage Bass Tuner Bushings 0019509049 001-9509-049
Kluson Replacement Tuning Machine Bushings For Vintage Fender Guitars
Musiclily Pro Metal Vintage/Modern 6mm to 10mm Guitar Tuner Conversion Bushings Tuning Pegs Adapter Ferrules, Nickel (Set of 6)|Guitar Parts & Accessories| - AliExpress