Zirconia alumina discs last 20x longer and remove material 3x faster than resin discs. For metal fabrication, blending welds, deburring, cleaning, stripping and finishing. Combines the grinding capabilities of a depressed center wheel and the finishing characteristics of a fiber disc thereby eliminating the switching of tools. Angled design works at 10° - 25° angle. For Metal & Stainless Steel. Flex-Abrasive® - Quality coated abrasives with superior cutting performance.