COMPACT ELECTRIC HANDPIECE UNIT Ball bearing high torque electric motor. Double insulation heavy duty construction. Automatic cooling fan for continuous high speed performance. Forward/Reverse switch. Standard package includes Variable Speed Foot Control, Handpiece and Handpiece Rest. Circuit overload protection. Application for grinding, polishing, milling of precious metals, ceramics, Unit is available for 100/110V 50/60Hz or 220/240V 50Hz operation.