The caliper is a device used to measure external and internal diameters and depths, in the industrial field.
It should be mentioned that it is a delicate device and must be used with care and delicacy so as not to scratch or bend it.
The micrometer, is a measuring device used with a micrometer screw to measure the size of an object with great precision, in a range of the order of hundredths or thousandths of a millimeter (0.01 mm and 0.001 mm).