The 2-pc Spring Loaded Oil Cooler Disconnect Set for Ford, No. 39100, from Lisle Corporationfeatures a special stepped design to fit connectors. Users simply push the line toward the connector, then engage the tool and pull the line from the connector. The two sizes, 3/8" and 1/2", are designed to disconnect transmission oil cooler lines on Ford vehicles. The 3/8" can be used on 2003-2010 Ford V8 Explorers, 2004 and later Ford F-150s, and Cadillac CS. The 1/2" disconnect can be used for Ford Super Duty Trucks, F-250, F-350, and F-450.