ok, so excuse me for asking elementary questions, but looking at these rivet hammers, what do you back them up with? I am seeing an OA torch to turn them red hot, tongs to hold them and put them in place, the rivet hammer to set them, but what holds them in place that has the mega-hundred pounds of torque the hammer is going to induce? what am I missing? thanks! this is a great thread. Where is a good place to purchase the riveter exactly?