Folding Utility Blade - Safety Version (tutorial)

I've had tons of people messaging me hoping for a safer version (with metal parts). Well here it is! This new (and most likely) the last version I will create, has a metal pivot and a metal pin for the 180 degree rotation mechanism. This adds a TON of strength compared to the previous versions. Even though it is much stronger than previous versions, still use for light duty work only - it is still just a plastic, 3d-printed knife after all. Links to the hardware I used below. I have also eliminated one of the magnets and replaced it with a “locking knob.” The knob locks into a hole, that locks the knife in the closed and open position. The main benefit to this is that when it's closed (and possibly in your pocket), it can't open unless you intensionally pull apart the wings. (see assembly and operational video at the end of the description). The blade holder has also been updated and improved! You can now easily remove the blade with no tools. (see video) I have also record