The Thexton 849 master cylinder brake bleeding and plug kit provides the adapters needed to bleed and diagnose a wide range of brake systems. The kit includes long lasting aluminum adapters for both SAE and metric fittings, allowing technicians to remove air from master cylinders on most makes and models. It also includes the latest Ford F150 adapters for compatibility with newer vehicles. Plug adapters allow testing of internal master cylinder seals to determine whether they are leaking or functioning properly. Built for repeated shop use, the aluminum components resist wear and corrosion. The 849 kit improves diagnostic accuracy and supports proper brake system service for professional technicians.