Do you remember if the rivets were 3/16" steel or aluminum. The ones I received were shiny steel (black ends) and were magnetic. My rivet tool wouldn't install them. I wrote Redline but also wanted to know if anyone else received aluminum or steel rivets, had issues with installing the rivets and which rivet tools did you use to install them. Two handing the rivet gun wouldn't work even when I added leverage to the handles. Did anyone buy the optional rivet gun from redline and did it work?