Size Designations
Size is usually determined by dimensions such as across-flats distance (inscribed-hexagon size). In the 19th and early 20th centuries, it was common to define the nominal size of the wrench according to the nominal size of the screw thread that it was meant to be used on. This is seldom if ever done anymore. (The accompanying photo explains visually.)
Read more about this topic: Wrench
Famous quotes containing the word size:
“There are some persons we could not cut down to size without diminishing ourselves as well.”
—Jean Rostand (1894–1977)