- We use brass bushing to resist galling or seizing to the holder
- Heat-cured, permanent expoxy bonding prevents loose bushings
- Our bushings are deep set to expose the most abrasive for long life
- Each wheel is pre-trued and checked to assure accurate, vibration-free grinding
- Ruby stones are comparable to the old Black & Decker general purpose stones
- 11/16"x16 thread