Disc Face Plate, Abrasive Mounting Quick Change System Not Applicable, Connector Size 7/8 in, Connector Type Unthreaded Hole, Backup Pad Shape Round, Density Extra Hard, Maximum Operating Speed 6,600 RPM, Number of Vacuum Holes Not Applicable, Color Red, Overall Length 11 3/16 in, Overall Width 10 7/8 in, Overall Diameter 9 in, Overall Thickness Not Applicable, Product Type Disc Face Plate