Concrete Floor Grinder Operation Walk-Behind Drive Type Planetary Number of Grinding Discs 3 Grinding Disc Diameter 9 in Grinding Width 20 in Planetary Motion Control Clockwise/Counterclockwise Horsepower 5 1/2 hp Voltage 220 to 240V Accessory Free Tool Change Yes Anti-Restart Technology Yes Anti-Vibration Technology Yes Cord Length Not Applicable Current 30 A Electrical Protection Dust Sealed Engine Brand Husqvarna