I use the 120 grit for my porcelain mugs and it has been the biggest lifesaver in evening out the bottoms so they don’t rock! After using this I go in with the 400 grit diamond flex pad. I get so many complements on my smooth mug bottoms from customers! This tool is a studio essential!
This product works great! My only complaint is if you buy it already mounted on a bat, they use one
of those hollow bats. Grinding on the hollow bat is loud.