Norton BearTex 3" SpeedLok TR Surf Blend Disc Med Maroon Application Info: 17522 Fibratex 3" Surface Blend Flex-Loc (Roloc) TR Disc Medium Fibratex Flex-Loc TR Surface Blending Discs Ideal for removing rust and oxides, blending out disc marks, and removing coatings and gasket residues from automotive surfaces. Thick, reinforced non-woven backing is impregnated with tough aluminum oxide abrasive. Advanced resin system will not smear.