CGW Coated Abrasive Disc, Type 29 Domed Semi-Flex, 4-1/2 in Diameter Disc, 7/8 in Center Hole, 16 Grit, Coarse Grade, Aluminum Oxide Abrasive, Fiber Backing, Applicable Materials: Cold rolled, Stainless Steel, Bronze, Aluminum and Iron, 13300 rpm Maximum, Brown