"Jon Danniken" wrote:

Hi Bill, and thanks again for your help. Now that I understand this method,
I will certainly acquire a proper square. I do agree that my current
project may likely be more suited towards using a well-squared section of
angle iron (due to the large corner radius), but the layout accuracy of my
other projects will benefit from the addition of a square to my arsenal.

Likely made in India. Set on surface plate, check each one to the other three, you will
see light if one or more isn't square. I have a set of 4 I bought years ago that is good
enough for what I do at home.

Wes