An external micrometer measures the outside of a part, whereas an internal micrometer measures the inside diameter of a hole or bore. Microtest lists both, including digital micrometers for inside and outside work.

Parts with accessible outer surfaces, such as shafts, pins, discs and flat stock, where an outside diameter or thickness has to be held to a tolerance.

They are used for outside dimension checks in production and inspection work.

Microtest’s digital external micrometer checks the outside of a part, such as the diameter of a shaft or the thickness of a plate, and shows the result on a digital display. Workshops searching for a digital external micrometers measuring tool in Saudi Arabia can match it with Microtest’s internal micrometers, so both inside and outside measurements come from the same range of digital micrometers and precision measuring instruments.