Thankyou Larry. I¡¯ve cleaned them up a bit today and found a few matching pairs. Internal and external I¡¯m guessing. My concern is the rather ¡°wooden tool handle¡± looking point on the end of each one.?
I¡¯ve avoided touching the ends while cleaning up but at least now I can see what thread they are.?
I¡¯ll await further comments before sticking them in ¡°any tool holder¡± in case a best practice is known of.?

Marc A Bradley
Facebook.com/stiffstatues
www.EasterIslandHead.co.uk
+44 (0)7549 200 258?
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On 19 Sep 2021, at 15:09, L Leonard via groups.io <metalmechanic@...> wrote:
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In the book 'American Copper & Brass" by Henry Kauffman, on page 60 there is an illustration of hand held turning tools for brass.? Two tools look remarkably similar to your find
Larry
On Saturday, September 18, 2021, 01:22:16 PM EDT, Ebay Boy <ebaybono@...> wrote:
Car boot find. Thought they might be some kind of threading tool??
What are they? how do you use them? What are they held in? Any ideas??
if worthwhile I can restore and use them.?
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