Hidden Key Artificial Rock

Don't get locked out of your house! Put spare keys in a rock and toss into your garden!

Surprisingly, there are no hidden key rocks on Thingiverse or anywhere else, so I decided to make a few. I found a few random rock 3d files, converted them and put holes in the bottom. One of the rocks is from chaparja44 here: https://www.thingiverse.com/thing:584629

You have four different types of rocks to choose from.

These things hold your standard house keys or two (or more). I didn't desig