bar gauge

I've done three versions of a bar gauge here.
Very helpful to check and transfer inside-, corner- or diagonal measurements if the folding rule does not work anymore.
My old one was made out of two leftovers and quite unwieldy.
These I redesigned from Veritas and Rockler.

https://www.rockler.com/rockler-3-in-1-bar-gauge
http://www.leevalley.com/US/wood/page.aspx?p=32585&cat=1,43513,43553&ap=1
http://www.leevalley.com/US/wood/page.aspx?cat=1,43513,43553&p=69879

As rods I took old ca