My hockey buddies last night were talking about the Iron Ring that Canadian engineers wear (my Dad was proud of his):
https://en.wikipedia.org/wiki/Iron_Ring
The ring symbolizes the pride which engineers have in their profession, while simultaneously reminding them of their humility. The ring serves as a reminder to the engineer and others of the engineer's obligation to live by a high standard of professional conduct.
Many incorrectly believe that the rings are made from the steel of a beam from the first Quebec Bridge, which collapsed during construction in 1907.