Powerful grinder with motor rated at 110 Volts ,60 Hertz. Speed can be changed from 0 to 10,000 rpm, rotations per minute/ Includes: 31-inch flex shaft & wrenches, 3'' grinder stone, 3'' fiber wheel 1/8'' mounted stone bit. Flex shaft collet: 1/8-inch , wheel arbor: 10mm. Powerful grinder in a compact size.