Small Utility Knife

Small enough to fit on a keychain... requires a three-parts from - Snap off blades 18mm -
No support needed, quick printing, perhaps 40 minutes... Add a drop of oil to facilitate movement.
And enjoy the sound of... closing... like a foldable knife.
Note: You may need to file down the area of ​​movement if there is a large sim due to the printing.

Update: these parts -SUK BH 1 - and -SUK BH 3 - have been fixed for better fitting .... and - SUK T Ho - is with hole for keychain