Guilty of not reading all the posts, but I made one of these to spread the rear frame rails on my Schwinn Crosscut frame when I switched to a little bit fancier wheelset.
I did an image search and I learned something today.Maybe, I don't know what they are.
I posted the picture but I don't know what they are, was hoping to find out.
The Pyramids could have been built in a Fraction of the Time had they taken the time to use one.It’s a device called a shovel calibrator.
It is employed to ensure that your shovel will function correctly in relation to the hemisphere in which it is being used.
Most folks have never even heard of one, much less have access, and are just going around using non-calibrated shovels.
Kind of makes you sad when you think about it.
Played a gig a few years back and somebody offered to buy me a Beer.