Features: - 6.3" long, 1.06" motor diameter, .75" grip diameter, 8.4 oz/237.7 gr., 115 volt - Ergonomic and brushless with long-lasting ceramic ball bearings - Bur changes are quick and easy with a simple twist of the front section of the Handpiece. SPEED CONTROL: - HP7-7060 Foot Speed Control - This variable speed foot control works with control box HP4-717 to vary the speed from 1,000 to 50,000 RPM.