This is a holder for Miniware TS101 soldering iron.
It's meant to be a pretty tight fit, that's still easy to use (insert and remove iron).
I'm using the provided finger shield, that this socket is made to accomodate, but TS101 or other similar irons should fit, albeit not as tight.
Holder was created using OnShape - link to project
I've used Skadis T-Clip system as a basis.