Oil Galley Plug Removal

I've said this before.........you should be able to buy various sizes of square keystock at your local hardware store. Also there are some special plumbing wrenches that are multi-square. You have any cold chisels? Check the shank size.............

As a "last resort" figure which socket drive is "too big" (if the smaller one is too loose) Go to "wherever" Horrid freight, buy a short extension, and grind it to fit.