3M Roloc Disc Pad Assembly 05539 is ideal for auto body repair jobs such as rust and coating removal and metal surface cleaning. The system includes a hard rubber pad, a Roloc shank, an adaptor, and all other necessary hardware. The hard rubber pad firmly attaches to the abrasive for accurate grinding, cleaning, and finishing. The included Roloc shank makes it a snap to attach to common drills and air tools with 1/4-20 and 7/16-20 shafts. Use with Roloc and Scotch-Brite Grinding Discs for fast and easy disc changeouts 3M Roloc Disc Pad Assembly 05539 is the go-to backup pad for the most aggressive collision and auto body applications.