Update 25/2/2024: Fixed knife blade point.

 I had noticed that there were not a lot of realistic pocket knife options out there, so I ended up CADing one. It turned out better than I had anticipated. It comes with a locking mechanism and two notches. One makes it so you can open the knife with your finger and wrist. The second notch makes it so you can open the knife by drawing it out of your pocket. And like all pocket knives, it comes with a pocket clip. If you happen to be left-handed, mirror the handle in Slic3r (Prusa Slicer) along the Z-axis. Remember, this is a 3D PRINTED KNIFE, so don't expect it to work like a real one. This is a work in progress so if you have any suggestions on making it better, please let me know by writing a comment. Enjoy!

Print Instructions: 

I suggest using the print settings that you know work for printing this knife. However, there are a few things I should mention:

1. Use the 3MF file format, which has all the support enforcers in the correct places. Of course, if you are an expert at this, use the stl file. 
2. Print the knife blade separately. I have found that printing the entire model together is faster, but it also adds a slight color change to the knife blade after it has finished the rest of the parts. I don't find it a huge deal, but if you want your knife blade to be perfect, print the knife blade separately.
3. Print the knife blade vertically. It makes it look a lot better. 

Note: The entire knife blade assembly shown in the pictures was printed on an MK3S+ using a 0.4mm nozzle diameter and PLA, at a layer height of 0.1mm. Ideally, PETG will probably work better.

Assembly Instructions:

1. Insert the knife blade into the handle
2. Insert the round connector piece
3. Take the hexagonal connector piece and insert it into the round connector piece
4. You will most likely need a hammer to lightly tap the pieces together

And you're done!

Happy Printing!