• General Purpose stones are used to remove material from cast-iron seats or inserts
• 13/16" x 13 thread

Goodson valve seat wheels are built to grind accurately and outlast the competition. 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.