To my understanding, they were hafted or wrapped and used as we would a modern hoe. This is only the third one I have found and by far the largest. You can see the odd sunken in lines up top from hafting in all of mine. Thanks for looking!
Not to be a pooper, I don't see any use marks?? The limestone hoes I have seen have a slick texture at least one -third of the hoe. Could is be a preform?