That's about my best guess for these things I found in a couple bins of odds and ends I picked up at a sale. One of them seems to be a blank, with the ends flat. While the others seem to be sharpened as turning tools.
They're magnetic, but seem much more like carbide when tested on the grinder. I'm not entirely sure what they're made of.
I have some ideas on making a holder for these, but curious to know what these are intended to fit into.