Quick Change Disc Backup Pad Abrasive Mount Type Quick Change Abrasive Mounting Quick Change System TS Connector Size 1/4 in Connector Type Straight Shaft Backup Pad Shape Round Device Material Rubber Density Medium Maximum Operating Speed 40 000 RPM Number of Vacuum Holes Non-Vacuum Color Black Overall Length 2 1/2 in Overall Width 1 in Overall Diameter 1 in Overall Thickness Not Applicable Product Type Disc Backup Pad