Material: S45C, Suitable for VW-Audi,Sear and Skoda 2.0,2.7 and 3.0 TDI Common Rail Diesel engine; as fitted toVWEos,golfV,GolfVI,Jetta,Passat,PassatCC,Scirocco,Tiguan,Transporter T5, Phaeton;Audi A3,A4,A5,A6,A7,Q5;Seat Exeo;Skoda Yeti etc.(Engine code;BMK,BPP,CAAA,CAAB,CAAC, CAAD,CAAE,CAGA,CAGB,CAGC,CBAB, CBAC,CBDA,CBDB,,CBDC,CDUD) Design to professionally disconnect/loosen as well as mount/lock the fuel return line push-fit connector(round design)at the injectors.An indispensable tool when removing furl return line push-fit connectors.Incorrect loosening may damage the connector resulting in the complete fuel return line in the engine compartment to be replaced.