For use on lambda sensors (oxygen sensors)  This tool covers a wide variety of options and fits most heated and non-heated sensors 1/2”  =  29x90 mm, 27x82 mm, 7/8” (22 mm)x50 mm 3/8”  =  7/8” (22 mm)x90 mm, 7/8” (22 mm)x80 mm, 1-1/16”x74 mm, 7/8” (22 mm)x31 mm Applications =  Audi, Citroën, Ford, Mercedes, Peugeot, Renault, Skoda, Opel, VW