Tight Spot Detail/Prep Tools - This kit cleans and details tight radius areas. Great for removing scale, rust and coatings. These mini 1in. 3-M Radial Bristle Discs are safer and longer lasting than wire brushes and are impregnated with abrasive; as the wheel wears fresh abrasive is exposed. Operate at 2,000 - 12,000 rpm. this kit includes 6 green (50 grit), and 6 dk. brown (36 grit) 1in. radial bristle discs and a 1/8in. and 1/4in. mandrel. Perfect for light finishing and detailing.