PSA Disc Backup Pad Abrasive Mount Type Adhesive-Backed 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 Soft Maximum Operating Speed 12 000 RPM Number of Vacuum Holes Non-Vacuum Overall Width 5 in Overall Diameter 5 in Overall Thickness 3/8 in Product Type Disc Backup Pad