PCD Cup Wheels-1/4 Round PCD scrapers are very common used on hand-held grinders, (like Metabo, Makita, Milwaukee, Dewalt etc) and some walk-behind grinders. Ideal for removing various coatings, like epoxy, mastics, carpet glue, thin-sets, paint, polyurethane and so on. The working areas are on wall edges, corners and spots that giant grinders are hard to reach and anywhere you can reach.