The product packaging says the disc should not be used faster than 3000rpm however most grinders will run faster than 10000rpm therefore this product can be used in most coffee grinders may not be safe to use. Also, the first picture shows a 5-hole wheel while the second and third pictures show an 8-hole wheel. Maybe it's not the same product? The 3000rpm top speed warning box didn't say it was a CWD203H even though it had a Stadea label on it. I returned it immediately.