The unique design of Lisle 37300 Fuel and AC Disconnect Pliers provides extra leverage when disconnecting quick connect coupling air conditioning and fuel lines. The pliers work with 5/16", 3/8" or 1/2" adapters from the Lisle 37000 or 39400 Disconnect Tool Sets. Different size openings on the pliers’ forks accommodate single or two step collar lines. The pliers can also be used to reconnect stubborn lines or connections that are in hard-to-reach areas.