Vintage Plumber's Wooden Drift Plug Tool Lignum Vitae Bearing?

Good minus to fair condition;Shows a lot of wear and use on the ends; I got this tool with a bunch of other plumber's pins, so I think it was being used as a drift plug, driven through lead pipes to straighten them. However, there is a hole drilled all the way through it, so it could have been originally a bearing or roller. I think it is lignum vitae, but I am not sure. It does not have that smell that fresh lignum has, but it is old.

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