OTC 7460 Diesel Fuel Line Wrench Fuel line nuts are often hard to reach but these unique 3/8 inch square-drive tools solve that problem With them you can loosen or tighten fuel lines at the fuel injector nozzle or fuel injection pump without damaging the nut Fuel line wrench 2.6 inch long For International 6.9L and 7.3L diesel engines Fits 5/8 inch hex nut