Features:1. brand new and high quality.2.Made of high quality material, durable and long service life3.Small body and it has great performance4.It is a common tool for guitar repairman5.It can use for installing Vintage tuning keys on modern 10mm tuner holesspecification:1. brand new and high quality2. Made of high quality material, durable and long service life3. Small body and it has great performance4. It is a common tool for guitar repairman5. It can use for installing Vintage tuning keys on modern 10mm tuner holes:Condition: NewColor: As picture showMaterial: MetalOuter Diameter: Approx. 8mm / 0.3inInner Diameter: Approx. 6mm / 0.2inPackage List:6 * Guitar Tuner Conversion Bushings Adapter Ferrules