Heavy duty all metal construction momentary foot pedal switch on off deadman style for power tools. Operate your tools with hands-free convenience. Works great for variable speed foot switch for power tools with built in rheostat great for scroll saws, sewing machine, dremel rotary tools and more. The ergonomics foot pedal switch allow precise and reliable speed control it is comfortable, easy to operate it lets you maintain smooth, precise speed control of your tool so both hands are free to work on your project. Spring loaded switch that turns off the tool when you lift your foot from the pedal. Can be used with other rotary tool or motors flex-shaft tool. For use with 115 Volt Rotary Tool like Foredom and Dremel. AC 110-120 Volt.