Powerful grinder with motor rated at 110 Volts ,60 Hertz * Speed can be changed from 0 to 10,000 rpm, rotations per minute * Includes: 3"" grinder stone, 3"" fiber wheel 1/8"" mounted stone bit * Flex shaft collet: 1/8-inch , wheel arbor: 10mm * Quantity: 1; Over All Dim: 8-3/8""L x 4-5/8""W x 6""H