Bolt access hole in axle

Some things to think about

Not knowing what you have for bits, you could just drill a "small" hole to clear an extension, and put the socket on after

You can drill some impressive holes with a hole saw, but you need a SLOW speed (I do NOT mean a typical 3/8 drill!!) and LOTS of cutting oil

I once drilled some 2" holes in 1/2" plate on a "the slowest speed" press

Yes, took awhile. I used WD 40, drilled 4 holes, and I think I used more than one can.