Pearl Abrasives Redline Grinding Wheels are especially well suited for grinding, weld dressing and deburring. Pearl Redline depressed center grinding wheels feature a MAX A.O. hybrid abrasive grain enables the individual grains to remain extremely sharp and durable, which results in increased efficiency and performance when compared to traditional aluminum oxide wheels. These Pearl Grinding Wheels also run much cooler by dissapating heat more effectively than standard grinding wheels, making these wheels ideal for situations where burning the material can be a problem. The Pearl Redline MAX A.O. depressed center grinding wheel has been designed with cutting effciency in mind, providing greater productivity for the operator.