Wall-mount pencil holder

This is a wall-mountable pencil (or pen) holder. When printed at 100 mm across, it holds a standard pencil. Just snap the pencil in place, or slide it in from the top. Make the holder slightly larger and it can be positioned horizontally as a cradle.

I found that over time, the holder weakened and one side snapped off. So I made a second version that's a bit beefier.