3M Green Corps type 27 depressed center wheel is a heavy-duty wheel designed to perform at the beginning of a project, as a grinding wheel, it's often the first step in a sequence. Use this wheel for rough grinding applications like beveling, slag removal, weld grinding and edge work on a variety of metals. - Type 27 for high rate stock removal. Provides fast cut and long life. For grinding, right angle grinding, plate grinding, edge chamfering, edge beveling, gate removal.