Annoyance is the mother of invention. I finally got sick of my tire iron taking up so much space on the garage shelves and came up with this solution, then thought of several other things I could do with it. Printed in ABS with 100% infill. Shockingly strong.

The shelf-side portion of the hook needs to be printed with support, but if you omit supports inside the key and just bridge across, it should be easier to clean up.