Low Profile Hook-and-Loop Disc Backup Pad, Abrasive Mount Type Hook and Loop, Abrasive Mounting Quick Change System Not Applicable, Connector Size 5/16 In.-24, Connector Type Threaded Shaft, Backup Pad Shape Round, Device Material Foam, Density Hard, Maximum Operating Speed 12,000 RPM, Number of Vacuum Holes 52, Color Black/Red, Overall Length 9/16 in, Overall Width 6 in, Overall Diameter 6 in, Overall Thickness 3/8 in, Product Type Disc Backup Pad