Oregon 510A Bench Chain Grinder 3400 RPM, .38-Horsepower, Direct Drive Motor One-Way Motor Rotation Runs on Standard 110-volt AC, 60-Cycle Current Large Motor fan and T-Shaped Cooling Fins Specially Designed, Easy-to-Use Handles and Knobs Includes Dressing Brick, 5-3/4 dia. X 1/8 thick Grinding Wheel, 5-3/4 dia. X 3/16 thick Grinding Wheel, 5-3/4 dia. X  thick Grinding Wheel (for depth gauges), and a template for checking depth gauge,wheel contour and chain pitch