Was in a box of tools and such. Looks like a lathe attachment of some sort.

2nd

and last

Ray, it looks like a balance wheel chuck for the lathe.

Thank you Brian, Got a lathe and parts in a large box and this came with it but separate from the lathe so I wasn't really sure.

Thank you Lindell, I guess I better get to looking for the missing chuck

Ray, I don't think you're missing a chuck. I believe the threaded part of your tool screws into the drawbar of your lathe. If it doesn't, you said the tool and lathe came separately,they may not be the same size.

Thanks brian, it fits the lathe so I've reunited it with all the other accessories that came with it