The shaft on the mirror has a slip fit joint that allows it to be moved into position with hand pressure. The problem is that the base plate that the mirror shaft is attached to is made out of pot metal and the screws don't hold too good. Mine also became loose and I found one of the screws were stripped from the factory. I used locktite on the threads and tightened them down by hand just to the point before the stripped screw would release and loosen up. So far so good...