Yes, that is the Bark River City Knife. The pocket sheath is called the Adirondack, and came with three I purchased (can't remember which 3 though

). Not sure if you could slice a roast, the blades are a little short for that at 2.6 inches. An onion? I don't know, maybe? Let's find out

:
It is .14 inches thick, but the blade is fully convexed so that aids in slicing.
More or less need to dig the ends out.
Not the thinnest slice in the world but the blade went right through it.
Decently thin slices once the onion was halved.
A little better at rough cutting.
Not too bad at dicing, but a kitchen knife would have been easier.
Overall it did ok. A kitchen knife would have been more efficient, but it did alright for what they are, handy little fixed blades.