Absolutely razor sharp and expensive to replace as is sliced boots, gloves, insulated pants, coats, fingers, etc. Oh yeah... fishing nets, man that had to suck.
As you know, Ice augers don't cut holes through the ice but 'shave' holes through the ice which let's a guy make all the free ice cones, ya can eat. Just add your favorite syrup but I wouldn't recommend Maple, unless your havin pancakes.