3M brush-like bristle disc removes coarse coatings from the large, open areas of a work-piece. Works on right angle tools quickly and easily with little or no pressure. Attachment type: threaded. Converted form: bristle disc. Equipment - machines: right angle grinders. Max rpm: 12000. Best position. Thread size: 5/8-11 INT. Measures 4-1/2-inches diameter. 36 Grit. Brown color.