Works on spring lock couplings found on Ford and Chrysler AC lines. Also, works domestic and import vehicles. The handles are angled to access tight spot. Made of durable plastic that is resistant to fuels and solvents, tools won't wear out Disconnects air conditioning and quick connect fuel lines. Also fits fuel lines and other quick disconnect couplings on domestic and import vehicles. Six sizes include 5/16", 3/8", 1/2", 5/8", 3/4' and 7/8". The handles are angled to access tight spots - more efficient and works where other tools won't.