This is the only timing tool you will need to insure your engine is timed perfectly. Timing your engine has never been easier and more precise. This tool is used to synchronize the camshaft sensor to the no. 1 cylinder. This tool, which is the same as Ford no. 303-589 works on 1998-2001 3.0L V-6 Ford Taurus, Mercury Sable, Ranger pickup and Windstar Van.We have 4 others if this does not fit your application. Comes with instructions.