Premium Brass Vintage Size Guitar Tuner Bushings 1/4" Vintage Tuning Keys Tuning Machines Ferrules for vintage ST/TL/LP guitars Brass 6.2mm(I.D.)* 8.3mm(O.D.) Nickel

KAISH premium solid brass tuning machine bushings for installing various vintage tuners on heardstock with vintage smaller 5/16"(8mm) or 11/32"(8.5mm) tuner holes; Please note these bushings DO NOT fit modern 10mm tuner holesMost vintage heardstock are drilled with 5/16"(8mm) or 11/32"(8.5mm) diameter tuner holes. Make sure to measure the diameter of your vintage tuner's string posts as well as existing holes in your guitar's headstock, and choose correct size (inner diameter/outer diameter) bushings accordingly6.2mm(0.24") I.D. bushings are used for Wilkinson vintage style tuners/Gotoh SD Series vintage style locking tuners(not for Gotoh standard vintage tuners)/various import vintage style tuners with 6mm string posts6.5mm(0.25") I.D. bushings are used for most USA vintage tuners/Gotoh SD Series standard vintage tuners(not for Gotoh locking tuners)/Kluson vintage tuners with 6.3mm string postsNice finished durable vintage tuner bushings, no burrs, solid brass construction and well built, easy to install, press-fit "drop in" bushings