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DieselTechRon calls it a fan wrench that he uses when removing an 03 ICP sensor. I believe he used it because it was easily bent to fit a little better.
Thanks guys, yes I grabbed that pic from DTRs video. Looks like a handy ratcheting wrench to have. I have google "Fan Wrench" and found nothing even close. Maybe someone will come up with it.
Thanks Ed
Or, you can get one of these extra long ratcheting wrenches (they look like they could be slightly bent fairly easily) w/ a socket adapter (3/8" drive adapter fits in a 13mm ratcheting wrench and the 1/4" fits in a 10mm ratcheting wrench)
I just took an el cheapo deep well socket and cut it down a little bit on the chop saw. That allows just enough room to attach the ratchet to get it loose.