AC/Fuel Line Disconnect Set Set of six tools which disconnect the spring lock couplings on Ford and Chrysler air conditioning line. Also works on fuel line quick connect couplings found on GM, Ford, and Chrysler. The 5/16" size fits on push lock connectors found on Ford radiators and transmission lines. Easy to use inconfined spaces. Set includes six sizes: 5/16", 3/8", 1/2", 5/8", 3/4" and 7/8". Available Individually: 37010 7/8" 37020 3/4" 37030 5/8" 37040 1/2" 37050 3/8" 37060 5/16" *Made of acetal plastic