Build with OpenSCAD, you can specify any size, space, number of rows, etc.

Build a custom rack for test tubes, condiment, ointment, Wheel lock key sets... anything that fits a cylindrical hole, or a conical hole, or a stepped hole.

I made this library for all my rack needs, and I like small files I can source control. So while is not a remix of the [Toyota Master Wheel lock key set holder](https://www.thingiverse.com/thing:984479) by [Tuan2410](https://www.thingiverse.com/Tuan2410), I thought I would reference it as one example is a clean-room clone of that.