For Fittings of 4AN, 6AN, 8AN, 10AN and 12AN. Reduce the risk of finger cuts and the hard work of manual installation. 1 piece Fuel Line Fittings Installation Tool. [Connector bracket] : Our fuel pipeline connector installation tool is equipped with 5 pairs of brackets for 4AN, 6AN, 8AN, 10AN, and 12AN connectors, providing more options.