Last one to post in this thread wins!

Ok I have a question for the body guys. I have seen them years ago and am looking to buy some. They looked like a special designed pop rivet and were used after body work was done. It is a pin that can be installed to retain the trim clip for places like the chrome around the vinyl top or side trim.
Never used them CF always used a screw with some sealant on the threads, would be handy though.