Weiler Saber Tooth flap discs deliver real performance on stainless steel, aluminum, inconel, titanium and other hard-to-grind metals. A grinding aid protects high value parts from heat discoloration and the self-sharpening ceramic alumina grain provides cool, fast-cutting action, allowing you to do more work, more quickly. Discs are contaminant free, with Iron, Sulfur and Chlorine < 0.1%.