OTC Tools OTC 7363 Fuel Line Disconnect Tool Set. This set works on quick connect fuel lines on Ford, GM, and Chrysler, and on the spring lock fuel line couplings on Ford's popular PFI system. Won't damage fuel line or fuel line connectors. Used on 5/16", 3/8", and 1/2" fuel lines. Two large tools are spring loaded, durable, and completely enclose the hose, which helps deflect any spray.