Found among my dad's stuff, and I'm not sure how to measure it to determine its size, but I will just list all the measurements.
The ends are steel and the center piece is brass. The overall length is 10-7/8" open and 8-1/4" closed. The opening of hole in the end is 5/32". The shafts are 3/16" and the threads are 1/4". Both ends do turn. It has the name Clary and a number that looks like 9L4R.
Please ask for any additional measurements, if needed. (1)