●For removal, inspection or replacement of heated and non-heated oxygen sensors fitted to the following vehicle; Audi, BMW, Citroen, Mercedes, Peugeot, Renault, Skoda, Vauxhall/Opel (GM) and Volkswagen. ●The Cut-away sections allow the sockets to fit over wiring harnesses. ●Chrome Vanadium ●3/8" &1/2" Size.