Used to measure the size of objects, such as length, diameter, thickness, external diameter of the object within the object. Used to measure the internal diameter of the object.
Use the handles to objects, to measure wall thickness. The length of the The external diameter of the object used to measure internal diameter of the object. Used to measure internal diameter of the object.
Use the handle to an object such as a measure of the thickness of the external diameter of the object length is measured in a diameter of an object used to measure internal diameter of the object