I made an parallel rack that would fit in one of the shallow top drawers of my new tool box. The original crappy blow molded plastic case was a little too tall and opening and closing it irked me anyway so I designed this off the top of my head. Made from aluminum bits & stainless screws.
To identify each one, I made some vinyl decals on a newly purchased toy, the Cricut Maker cutting machine. I did fractions on the right and decimals on the left. Gave me a chance to get some practice with that and I really like the way it turned out.