Add to Cart Kanetsune KC-657 Gokujo-Toishi Whetstone #1000 Grit The KC-657 is a Gokujo-Toishi, highest grade whetstone. This whetstone is a wonderful maintenance item for your blade care routine, and offers #1000 grit, medium. Made in Japan. Specs Model: Kanetsune KC-657 Gokujo-Toishi Made... MSRP: $150.00 $120.00 Add to Cart Add to Wish List Compare