- We use brass bushing to resist galling or seizing to the holder
- Heat-cured, permanent epoxy 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
- Nickel Chrome Valve Seat Stones are ideal for aluminum heads with chrom-alloy seat inserts, they won't load up or groove
- 11/16"x16 thread