Quote Originally Posted by katy View Post
At the start the tool appears to have right hand thread, and then at 0.07 it appears to have left hand thread? Are my eyes deceiving me?
I think one side is right hand thread, and the other left hand thread. My usual attack is to use a LH drill bit. They will often bind up and back the broken bit out by themselves, though not always. Then an extractor that screws in to the left, or drives straight in, and turned left and right to break it lose, then left to get it out for most normal hardware anyway.

HTH!

Bill