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3M Blue sanding discs feature modern abrasive technology that combines ceramic grain and aluminum oxide abrasive material with an anti-loading coating and heavy-duty construction for better finishes and longer disc life.
Blue abrasives cut through paint, filler, and primers fast, with consistent results. Stikit adhesive attachment allows fast disc changes. Model 321U 6'' discs are available in a full range of grades for everything from repairs, to surface prep prior to painting, and finishing.
Choose from the following grades: 40, 80, 120, 150, 180, 220, 240, 320, 400, 600, and 800.