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 Medium Maximum Operating Speed 15 000 RPM Number of Vacuum Holes 140 Color Yellow Overall Length Not Applicable Overall Width 5 in Overall Diameter 5 in Overall Thickness 1/2 in Product Type Disc Backup Pad