Fitment Compatible for Fuel Pump Module Spanner Wrench for Mercedes-Benz BMW Audi Volkswagen VW Chrysler vehicles . Adjustable 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. Feature It's compatible with all vehicles that have silent fuel tank lids 3/8-inch to 1/2-inch (38mm to 168mm) in size. Installtion .