Features: The foot pedal control switch is very easy to use. Just plug the foot pedal into your wall outlet, and then plug your device into the back of the plug, and the foot switch pedal will now be in line with the flex shaft motor. The foot pedal control switch is with heavy duty plastic housing. You can control the speed with this foot pedal pricisely and easily Note: When the foot pedal can not adjust speed pricisely, please adjust the screw at the back of the pedal a little and then try it.