Mirka's backup pads are manufactured using a top quality molded polymer construction. Each pad is balanced to eliminate vibration and provide superior finishing. 5-Inch and 6-Inch pads have a maximum operating speed of 12,000 RPM. The grip face has durable nylon hooks for use with 5 hole vacuum patterns as well as Abranet multi-hole patterns. 105GVBDRP Abranet Grip Faced Vacuum Backup Pad can be used as a replacement for 3-hole Porter Cable electric tool mount.