The Performance Tool A/C and Fuel Line Disconnect Set, No. W83101, is designed for automotive fuel, A/C, and transmission cooler lines on most GM, Ford, Chrysler, and Mazda models. Disconnect the spring lock couplings simply by pressing the tabs into the opening of the fitting. The off-set handles are angled to access fittings with limited space to work. Made of a tough durable plastic that is resistant to fuels and solvents, the works on quick disconnect couplings on most domestic and import vehicles. Set includes seven sizes: 1/4 (6mm), 5/16 (8mm), 3/8 (9.5mm), 1/2 (13mm), 5/8 (16mm), 3/4 (19mm), and 7/8 inch (22mm).