Tool included service the many types of quick-disconnect fittings used on GM . Ford, and ,Chrysler vehicles. Tools service heater hoses, transmission oil coolers, air conditioning and fuel lines. They are vehicle manufacturer approved; will not damage fittings being disconnected. Tool No:AC-24001, AC-24002, AC-24003, AC-24004, AC-24007, and AC-24008 are used on Ford air conditioning and fuel lines. They are spring-loaded in the closed position to deflect any spray that occurs when the line is disconnected, Handy grease and fuel-resistant storage trays that fit in a tool box are included.