Abstract: The invention relates to an adjustable master setting gauge. The gauge comprises a frame including a generally flat portion. A bar is mounted generally parallel to the flat portion, the bar comprising a portion of a height gauge fixture, one end of the bar being slidably supported within a base, and the other end of the bar being telescopically attached to a micrometer head. A bracket extends from the frame, the bracket including a first gauging surface laterally removed from the bar. The adjustable master setting gauge further includes a gauge mounting member detactably attachable to the bar and having an arm extending laterally from the bar. The arm includes a second gauging surface and the first and second gauging surfaces are laterally removed generally an equal distance from the bar. Thus, the distance between the first gauging surface and the second gauging surface can be adjusted by rotation of the micrometer head.