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" x 16 thread.