in place, like a piece of cloth ... maybe with some sand or something inside. And the bottoms have cut marks, like chopping nuts or something like that.

If you tried to pound meat with that surface, you'd get mush.

grinder? A Donald Trump butt plug?

Do a search on Etsy for more info.

Sock darner it is, though many have more an egg shape than these two.

Or Darning egg. Some are shaped more like an egg. Not sure why.

Especially with smaller children's socks.

I think a flat one would be difficult to use.
I used the egg shaped one when I was young.

I only have experience in buying and selling things prior to the 70’s. But I’m always fascinated by the things I come across.

And things my mother and grandmother used on a daily basis.

shaped like these on Ebay.