Disconnects Air Conditioning and Quick Connect Fuel Lines. Connect Fuel Lines. Disconnects spring lock couplings on Ford and Chrysler AC lines. Works on fuel lines and other quick disconnect couplings on domestic and import vehicles. The handles are angled to access tight spots. Made of durable plastic that resists fuels and solvents. Six sizes: 5/16", 3/8", 1/2", 5/8", 3/4" and 7/8". All disconnects available individually skin-packed. 39410 Yellow 5/16" 39420 Blue 3/8" 39430 Red 1/2" 39440 Green 5/8" 39450 Orange 3/4" 39460 White 7/8"