Features: * Fitment: Fit for Fuel Pump Module Lock Ring on Mercedes-Benz BMW Audi Volkswagen VW Chrysler vehicles. It's compatible with all vehicles that have silent fuel tank lids 3/8-inch to 1/2-inch (30mm to 168mm) in size. * Function: Used with 1/2" drive ratchet or breaker bar. Easily remove and install Fuel Pump Retaining Rings! * Adjustable: Fully adjustable from the middle track allowing for a custom fit and better grip. * Nice Features: The Fuel Pump Spanner Wrench is fully adjustable from 3/8-inch to 1/2-inch along the middle track, which allows for a custom fit and better grip during removal and installation. .