The Lisle Corporation Aluminum Disconnect Set, No. 35800, is designed to disconnect spring lock couplings on Ford and Chrysler air conditioning lines. The set also works on fuel line quick connect couplings on GM, Ford, and Chrysler. The set is easy to use in confined spaces and includes six sizes: 5/16", 3/8", 1/2", 5/8", 3/4", and 7/8".