Without proper grounding, your car is isolated from the earth by the rubber tires, causing a buildup of positive ions that can negatively impact your health. The Car Earthing Belt provides a connection between your car and the earth to dissipate these harmful ions. How to use: Attach the metal cable tie around your exhaust (or any other metal component) Tighten the cable tie around your exhaust tightly using a screwdriver. Make sure the wire at the end of the belt touches the ground. You can adjust the length of the belt by loosening the 2 screws on the fitting.