Aluminum oxide used as a grinding and polishing media is a cost-effective and efficient medium for tumbling operations that require quick edge rounding, surfacing finishing, or cleaning. Approximately 50% lighter than metallic media, aluminum oxide grit grain has twice as many particles per pound. The fast-cutting action minimizes damage to thin materials by eliminating surface stresses caused by heavier, slower cutting media. Aluminum oxide grit contains less than 1.5% free silica and is, therefore, safer to use than sand.