The Redline™ uses Pearl's exclusive MAX A.O.™ abrasive grain, MAX A.O.™ was engineered to offer aluminum oxide users a higher-performance alternative at a competitive price point. The Redline™ MAX A.O.™ abrasive grain properties and premium resin bond technology truly set it apart from the competition by maximizing the performance available with an aluminum oxide product. The Redline™ is available as a standard grinding wheel or as a Pipeline style, combination cutting, and light grinding wheel