Dotco 12-13 Series Gearless Right Angle Sanders, 300 Series Collet feature durable composite housing. Dotco 12-13 Series Gearless Right Angle Sanders, 300 Series Collet are available in a wide array of speeds making them suitable for any industry. Dotco 12-13 Series Gearless Right Angle Sanders, 300 Series Collet are available with either a front or rear exhaust. Dotco 12-13 Series Gearless Right Angle Sanders, 300 Series Collet are suitable for a wide range of finishing applications.