Or you could get a O2 sensor socket
I have an 02 Socket. Started rounding the old 02 sensor with my 2 ft extension bar.
Not sure how I will get it off.
That's the problem I've heard about with an O2 socket.
They have a slice in them and they can bend/open up when you reef on them.
If you're not reusing the O2 sensor, you can just cut the wires off and use a regular deep socket.
Putting a torch to it can really help loosen it up.
Problem with cutting the wires is that once you do that there is no going back.