Attributes . Sizes: 1/4", 5/16", 3/8" and 1/2" Oil Cooler Line Disconnect Tool; Fits any 5/16" or 3/8" Fuel Line Found on GM, Ford or Chrysler cars; Sizes 5/16", 3/8", 1/2", 5/8", 3/4" and 7/8" Air Conditioning and Fuel Line Disconnect Tool; 5/16" Disconnect Tool Allows Usage on Push Lock Connectors Found on Ford Radiators and Transmission Lines . Names