Hook-and-Loop Disc Backup Pad, Abrasive Mount Type Hook and Loop, Abrasive Mounting Quick Change System Not Applicable, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Backup Pad Shape Round, Device Material Foam, Density Medium, Maximum Operating Speed 10,000 RPM, Number of Vacuum Holes Non-Vacuum, Color Black, Overall Length Not Applicable, Overall Width 4 1/2 in, Overall Diameter 4 1/2 in, Overall Thickness Not Applicable, Product Type Disc Backup Pad