3" 320GR Very Fine Blue Norton Speed-Lok Surface Blending Disc (25/box) Application Info: 09192 Bear-Tex 3" Surface Blend Speed-Lok (Roloc) TR Disc Very Fine Bear-Tex Speed-Lok 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.