... :POWER: Single Phase, 50-60HZ, Double Insulated RPM: Single Speed 20000Variable Speed: 18000~20000 Operation:This tool is design for carver, engrave ... , rout, grind, sharpen, send, polish, drill and more.Unplug the tool ... orange line on it. Slide the switch to find the speed needed from 18,000-20,000RPM, Slide the switch to ...