Designed to Replace Fuel Line Fittings Without Damage to Fitting, Fuel Rail, and Fuel Line Reducing the Possibility of Fuel Leaks.

• 17mm socket works on Audi A1, A3, A4, A6, A8, Volkswagen Passat, and BMW N54, N63, and S63 engines. Also works on Ford Power Stroke Engines.

• 19mm is found on 2011 and older diesel engines plus Cummins ISB engines.

• 21mm socket works on Paccar MX 11, and MX 13 engines.

• 22mm is used on the newest ISX Cummins motors.

• 24mm is used on NOx and soot sensors.