I had some hex bolts to install in one of those upside down, twist your hands, can't see where you are going, I'm too old for this situations.
I could get a bolt started, but not enough room to turn it, so I got a socket and I could get that on the bolt head, but it was too narrow for me to turn. I found these 1/2" to 3/8" drive adapters which I can't say I have ever used, but they came in a set.
Grip was a little better, but now I was dealing with a smooth cylinder to grip and oil/grease didn't make that easy to turn. So - why not Knurl it?
Sure, why not? It is easy! Nope - the adapter was gripped on the tip of the three jaw chuck and the knurling wheel barely fit onto the adapter but the side bars of the wheel were a problem. I tried, but just a little pressure and the adapter popped out of the 3 jaw chuck. So I looked through the 1/2" extensions and found one that was the least wobbly and chucked up the extension and popped the adapter on the end. Now the knurling tool had space to work.
First tried to do a knurl and move the cross slide to get the full adapter face, but that just worked the adapter off the extension, so I figured - it won't look pretty, so lets just knurl a spot, back out and move over and knurl some more. Correct. it wasn't pretty, but it worked:
Attachment 50258
I did both of what I had. When I put the adapter on the socket, I had grip, even when oily and in the bolts went!
