Going to stick my neck out on this one................
Street Rods have been defined as an individuals personal taste of how a vehicle should be............that includes sometimes a lot of fabrication.
With that in mind, I guess I would look around and under your vehicle you purchased, because looking at the picture, it looks like it could be one of those fabricated tools that is needed to do something with the previous owners fabrication.
??
House water filter tool seems like a good guess to me. But why was it left in the car? Who knows!Like a fuel filter remover because it looks like a house water filter tool
Ding, Ding, Ding. We have a winner. Two winners, 37 truck said this too.It's a Billet Specialties Hex Cap Removal Wrench. Lots of them listed on eBay and other similar places. Walmart even sells them.