Wow, that takes me back. I learned to use these when we hand riveted the copper ashtrays we made for high school shop project.
Times have changed - an ashtray was on the list of standard shop projects, right after the hand wound DC electric motor and before the wooden toolbox. Now most schools don't even have shop class anymore, we have to pretend nobody smokes, and there's no point in teaching anyone how to make something anyway since they're just going to spend their lives ordering imported **** from the internet.
Sorry - forgot to put up the "Rant Ahead" warning flag.
Joe