This is a collet holder similar to others that I have seen, but more specific to my needs. It holds 20 collets in a 3X4 gridfinity space. I have extras of 1/8", ¼", and ½" and those are my most used collets so I made extra spots for those along one side. It holds my extras plus this set from Amazon.

I have included two versions, one with and one without labels. The pockets are deep enough and have a chamfered bottom so that you can print the labeled one face side down so that the text is nice and crisp. The one without labels would need to be printed grid side down or it may need supports. I didn't print one of those, but I'm including it if anyone needs it.