The first print can hold things such as shovels, small rakes, or other tools with a thin neck and larger face such a shovel. The images provided show some tools I have being held on them in my garage. The second print was designed to hold a small 3-step ladder; however, it could be used for many things. I've been using these for upwards of 6 months now. For outdoor use, I recommend using PETG.
I printed this using 2 perimeters and honeycomb infil and it's been holding fine. For very heavy items, I recommend using 3-4 perimaters and honeycomb infil.
*I just added a longer variant (6" hanger line vs 3" line)
The author hasn't provided the model origin yet.