This is a stylus tool I use in my other hobby, polymer clay craft to create indentations and carve surfaces with. I couldn't find the tool I was looking for at the store, also I needed like 30 of them for my students, so I just made this in inventor instead.
The print size should be about 6 - 8 inches long.
I recommend printing with some supports, but no extra platform adhesion as it is a cylinder. I printed it horizontally against the print plate.
Also, 100% infill. Oh, and probably would print better in ABS but I have made this out of PLA without problems.