... considered Daedric artifacts?

Weren't both of them made by the Dwemer long ago?

Edit: * Volendrung

Maybe because the Daedric Lords decided to keep them?

It's something I've been wanting to know too.

Don't you mean Volendrung? Volunruud is a Nordic ruin.

I didn't notice it at first. But I'm sure that's what he meant.

That's the giant hammer (from the Orcs) right?
Great weapon.
There are a lot of Artifacts...
I think calling them "Daedric" is a bit arbitrary though.
The Daedra tend to claim anything fascinating - who's to tell them they cannot?
But I believe Malacath claimed that hammer.

s**t...yes. Dammit

look up their lore, it pretty much explains why daedric princes took them as artifacts

I imagine Daedra probably won them in deals with mortals and imbued them with aspects of themselves.

Well the Dwemer certainly aren't using them.