I just read some of the replies and they are not reading what the OP wrote.
This is an EXTENDED ported choke tube that DOES NOT have notches for a choke tube wrench. It is screwed in by hand, not with a wrench.
OP, do you want to salvage the tube? Fuggh that, throw some vice grips on it.
You said you cannot use something substantial to put into the ports to turn it? Take that son of a bitch and put the tube in a drill press and drill STRAIGHT through the sides of the tube. Make the holes large enough (drill bit) to stick something "substantial" through both holes and then crank it out. Put something long enough in there to use both hands. Heat the end of the tube first after soaking it overnight.
You have an advantage it being an EXTENDED tube. It's up to you how bad you want it out.
