Summary

These "Monkey Hooks" are known by other names. They are wall hooks for hanging pictures and things. They make one tiny hole in the sheet rock, and are preferred if you rent a place, and want to do minimal damage to the walls.

They can hold a lot of weight (the ones pictured are rated at 25 lbs). But one downside is the hook part is small. I made these extensions so I can hang thicker things, like the thermometer in the photo.

First install the wire hook into your wall. Then squish a little 5-Minute Epoxy into the slot in the extension. Push the extension onto the hook.. it's a snug fit.
Adjust the position, wipe away any excess and let the epoxy harden.

The print is simple. Orient it upside down, so the slot is on top, and doesn't get filled. Took about 5 grams and maybe 15 minutes if I recall correctly.
Metric files also provided. Some software doesn't correctly interpret inches... thinks they are millimeters.