This simple keychain stand is designed for use in a gift shop. Of course, it is valid for home users, but elegance is not guaranteed :)
There is a 0.1mm gap between two objects for assembly purpose, it worked well for me, should work for you I guess.
Just firmly push the arm into the square hole on the base. If you can not push it all the way, chamfer will be seen as unfinished. Just go to a gym, do some work outs and try again.
arm.stl | 221.4KB | |
base.stl | 165.6KB | |
set.stl | 386.9KB |