A two in one wrench for oil service on many popular makes including BMW, Porsche and VAG. Applications: Audi A4, A6; BMW, Porsche Boxster; Volkswagen Golf IV, Passat, T4 and T5. Double ended: 19mm Hex x M16 tamperproof Spline. 19mm single Hex and M16 Spline (tamperproof).