Cal-Van Tools Fuel Line Disconnect - 2 Piece has fuel line service tools. They were designed to remove stubborn fuel lines from today's cars and trucks. They are made of aircraft grade aluminum, which makes them very light and strong. The opening is 3/4 inch and tapers down to 1/8 inch. This allows a universal application with just two tools. The low profile design provides access into the smallest places with the most force available to remove the worst nightmares. It has a patent pending.