The weld on the handle seems a little flimsy for that job. Also the threads seem too big. I'm thinking it's more of a tool. Threads into something and then you pull on it?found an image that might help visualize what i wrote
What are rough dimensions?
Maybe too pull injectors or something else from engine?
It looks exactly like the "screw" that clamps down the salon table on our boat, except ours isn't bronze.
I don't have a picture, but it tightens the collar around the round aluminum pedestal stock under the table.