The Thexton Universal Master Cylinder Plug Kit, No. 803P, enables the technician to isolate the master cylinder from other brake components. It tests whether the internal seals are leaking or in good condition. Includes 26 machined aluminum plugs to fit most domestic and import vehicles. The kit features 29 adapters. SAE sizes include: two 3/8-24, two 7/16-24, two 9/16-18, two 9/16-20 and two 1/2-20. Metric sizes include: four M10 x 1.0, four M10 x 1.25, two M11 x 1.5, two M12 x 1.0, two M12 x 1.5 and two M13 x 1.5. The kit also includes two M14 x 1 bleeder screws for the Ford Focus and Escape. Also, included is a thread gauge.