Superior Pads & Abrasive RSP29 5″ hook-and-loop pad with 5 holes Replaces Porter Cable 13904 / 13909 the standard replacement pad for the Porter Cable 333, 333VS random orbit sander. Enjoy the convenience of the five-hole dust collection feature and easy screw-on installation using the screws of your sander. The hook-and-loop pad accommodates 5″ hook-and-loop discs and is sold individually.