Pferd Coated Abrasive Disc, Standard, 5 in Diameter Disc, 7/8 in Center Hole, 120 Grit, Aluminum Oxide Abrasive, Fiber Backing, Arbor Attachment, Applicable Materials: Brass, Cast Iron, Copper, Zinc, Very Hard Aluminum Alloys, Plastics, Non-Hardened and Non-Tempered Steels, 12200 rpm Maximum.Pferd supplies an extensive line of fiber discs in a variety of grit sizes, abrasive grain and dimensions. Our comprehensive product range includes the right tool for any application, from coarse to fine grinding. Pferd 62508 Standard Coated Abrasive Disc, 5 in dia, 7/8 in Center Hole, 120 Grit, Aluminum Oxide Abrasive, Arbor Attachment