Bestop sunrider has a hinge where it opens. That hinge is apparently called a pivot knuckle and a search shows some chatter on JK forums about the part failing. Well I have a 2006 TJ and can't find a replacement specifically for my old girl, and Bestop customer service is just not getting back to me , which is surprising. I found a part that looks identical at Extreme Terrain but they say it won't fit a 2006, however the same part is also available at Just For Jeeps and they say it will fit 2004 - 2018. Before I go paying $46 plus shipping I figured I would check here and see if anyone else has been in the same boat. This is what the part looks like: