Ball bearing high torque electric motor.3,500 to 35,000 R.P.M. variable speed.Double insulation heavy duty construction.Automatic cooling fan for continuous high speed performance.Forward/Reverse switch.Standard package includes Foot Switch, Handpiece, and Handpiece Rest.Optional variable speed foot control.Application for grinding, polishing, milling of precious metals, ceramics, acrylics, and steel.Specifications:110/220V 50/60Hz ACDimensions:L160 x W125 x H80 mmWeight:1.8 kgAccessories:Control Unit, Electric Handpiece, Handpiece Rest, Foot Switch, Power Cord, Operation Manual