My sissybar is a Hondaline, I believe. It has 2 allen head bolts on each side. They are all rusted and I wanted to change them. 2 are welded in by the rust now. They are super hard. Any suggestions on drilling them out. I have gone through several drill bits and have only succeeded in shining up the stripped out allen head. The picture below doesn't show the bolts, they are the bolts that hold the bar to the bracket and they are on the inside. I just wanted to post the pic in case somebody could tell me what brand of bar it is.