I have a bunch of hex keys from various Creality 3D printers. I wanted a holder for them that would keep the hex keys in place, but still easily removable. I also wanted it to be easy to mount/remove from a wall, tool box, or other surface. There are a ton of good designs on thingiverse, but I decided to take a slightly different approach based on a magnet. The magnet holds the hex keys in place and also acts as a mounting mechanism. I was inspired in the basic design by another model on thingiverse, but I lost track of which one. Apologies to the original author.

I have included a Fusion 360 file which will make it easy to change which sizes are included. The model I used actually holds two sets of the smaller hex key sizes.

I used a 60 x 10 x 5 mm bar magnet which can be found many places including here: https://www.amazon.com/gp/product/B07F584P7S/