For quick and easy separation of fuel, A/C and automatic transmission line quick-disconnect fittings. This set includes: 5/16", 3/8", 1/2", 5/8", 3/4" and 7/8". All Powerbuilt products meet or exceed applicable ASME, ANSI and US government quality standards and are backed by a lifetime warranty on all tools.The Powerbuilt A/C & Fuel Line Disconnect Set makes for quick and easy separation of quick-disconnect fittings on fuel, A/C and automatic transmission lines. This six-piece set includes 5/16", 3/8", 1/2", 5/8", 3/4" and 7/8"disconnect tools. Tools are color-coded and size-marked for ultimate convenience. Designed with flexible material that can be twisted to fit over line. Any automotive specialty tool makes an automotive repair or maintenance task easier, but Powerbuilt takes the concept of ‘help’ a big step further. Every package comes with professionally written usage instructions and photos that take you step by step through proper tool usage.