Product review (5 stars): They ended up fitting so don't give up.
At first I ordered the rollers thinking that the stud came with it based on the reviews that I'd read. So I ended up ordering these and thought they wouldn't work. I called the company and left my phone number. They called me back the same day and apologized but it would have cost me to return them. Well, I took a second try and managed to get them to fit much to my surprise. That made my day!  My dishwasher model is GE profile PDW7880J03SS.  THE ORIGINAL BRACKETS HAVE A SIDEWAYS ATTACHMENT BUT THE BRACKETS I AM REVIEWING ALSO FIT. JUST PUSH THEM ONTO THE LOWER SHELF STEM AND THEY WORK! I appreciated the great customer service.