Tire Grinding Kit 7 Inch 11 Amp Polisher/ Grinder: 11 Amp. Adjustable dial speed control. Lock-on switch for comfort during extended use. Auxiliary handle mounts either side for left or right-hand use. Includes Hook and loop pad for sandpaper, and rubber pad for polishing bonnet. Also great for grinding tires. 8 Inch Backing Pad: Backing pad is a one-piece unit that features a soft foam backing and a molded-in threaded insert to mount directly to the sander. The backing pad accepts hook-and-loop style sanding discs. 8 Inch Grit Disc, 36 & 24 Grit: Sanding discs are for use with the 91082086 Backing Pad other sanders that have a 5/8"-11 arbor, which features a hook and loop style backing for easy installation and removal. Discs are sold in a package of 5. Rated up to 6000 RPM. Included in this kit: (1) 72822504 - 11 Amp Polisher/Grinder (1) 91082086 - 8 Inch Backing Pad (1) 91082087 - 8 Inch, 36 Grit Disc Pack (1) 91082088 - 8 Inch, 25 Grit Disc Pack