A new line of zirconia miniature flap discs that come in four grit sizes for grinding, blending, and finishing stainless steel, aluminum, and mild steel is being introduced by Rex-Cut Products, Inc. Rex-Cut® Mini Flap Discs feature a quick-change Type R fastening system to let users easily change between coarse, medium, fine, and very fine grit sizes of high-performance zirconium grain abrasive.