Our 10.5mm Round Guitar Tuner Conversion Bushings are press-fit brass conversion bushings that allow you to install tuning machines with 1/4"-diameter string posts into Fender's modern 10.5mm-diameter pegholes. Great for retrofitting vintage-style tuners — no need to plug and redrill the peghead. Set of 6. Please measure your pegholes before ordering. Specs for our round 10.5mm conversion bushings: Outside diameter at top of taper: 0.415" (10.54mm) Outside diameter at bottom of taper: 0.395" (10.03mm) Round-shaped collar diameter: 0.457" (11.61mm) Sold as a set of 6 gold bushings.