Oy, max, what is that on your hand? Did you try to caress the blades again?
It's a saw.
See the little maroon handle with the gold cap in those pics? It's a shinto saw rasp, basically take like 8 hacksaw blades, bend them into a side-to-side zigzag and bolt them together. All the teeth end up presented to your work surface at around a 45 degree angle and have large open spaces beside them to clear swarf which is fantastic.
One side has like 11 teeth per inch, the other side has like 30 teeth per inch I think, so there is no really safe side except the very outer edges between the two rows of teeth.
To rasp a smaller workpiece with one, you can rest the rasp on a rag or something over your knee and drag the workpiece across the teeth in a nice controlled fashion, and it's really easy to hog lots of material off like that.
So easy sometimes that you forget just how sharp those teeth are and ever so lightly brush past a couple by mistake.
Never hurts like a proper knuckle-rasping would, but you can bet your ass it is going to bleed when you bend your finger again.
... it looks like someone stopped making some sort of push dagger part way through. I know what a failed blacksmithing check looks like in real life, now.
Well it isn't toothed yet, just the raw plate blank and bolt holes plus spine alignment are set, but the handle is woodworking via coping saw, hand drill, rasps, files, and sandpaper/scrapers. On the other hand all of the metalwork I do is with files, hacksaws, brakes, and hand drills so I don't begin to approach blacksmithing yet.