Forney 72323 Backing Pad with Spindle Nut, 7" x 5/8-11Backing pad with spindle nut for sanding discs and buffing bonnets. Heavy duty and flexible. 10,000 Max RPM. Size: 7" x 5 8 11 For sanding discs and buffing bonnets Heavy duty and flexible Max RPM 10,000. WARNING: This product can expose you to chemicals including Indeno [1 2 3 cd]pyrene which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www. P65Warnings. ca. gov