Blade D82 Carbide, Double-edged, Heavy-Duty Blade . The D82 is a heavy duty, double edged carbide blade. Scrapes surfaces and deburrs sheetmetal up to 0.35" (9mm). Great for Slot Keyway Applications and Good for use on Steel, Aluminum, Copper, Brass, Cast Iron, Stainless Steel, Hardened Steel and Plastics