This is a phone stand with elevation adjustment capabilities which is done by a worm drive.
All fasteners used are M4 and some parts may need to be joined
...Plus together with superglue.
The Worm Drive and Gear must be aligned in a specific orientation.
For Assembly instructions please refer to the exploded drawing.
Note:If you are having trouble printing the worm drive as a whole part, you can try printing the alternative Worm Drive 1 and 2 with the key first, then superglue the 3 parts together. You may need to use a file or knife to refine the part edges to get them to fit together depending on your print quality.