Here is an Unusual Solid Brass Tool that I bought at an Antique Auction.  It is marked SAILBOATS, and looks ot be 13 5/8" long.  It looks to fit a square 5/8" fitting.  I search I did on the net and google lense and came up with nothing like it, so may be a little rare???  It looks to weigh just under 2 lbs.  USA lower 48 buyer to pay $17.50 s/h.