I just bought a 2007 4Runner and the attendant at the lot was trying to remove the screws from the threaded holes while I completed the deal with the sales person. When we walked out to my now signed for new 4Runner the attendant was standing looking at the screw he broke off in the hole. It was 7:30 pm and I lived 1hr and 20 mins away so I said I would take care of it. Tried broken bolt/screw extractor and extractor broke and lodged in screw. Tried hardest metal drill bit but will not even cut into screw. If I take off the tail gate panel can I get to the back of the screw?