This is a soldering iron holder made to be attached to the honeycomb storage wall originally designed by RostaP. This can be attached to a small hexagon or to any slot using an insert. I prefer the empty insert found here: https://www.printables.com/model/723247-modified-inserts-for-hsw-6mm-nozzle-compatible/files
The author remixed this model.
I designed this attachment to hold my soldering iron, solder, solder sucker, extra tips, and sponge.