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 Hard, Maximum Operating Speed 30,000 RPM, Number of Vacuum Holes Non-Vacuum, Color Black, Overall Length 2 1/2 in, Overall Width 1 1/2 in, Overall Diameter 1 1/2 in, Overall Thickness Not Applicable, Product Type Disc Backup Pad