I have a couple of these bead drivers in my tool inventory. Just used one a few days ago changing to 21" radials. Works fine for the little soft tires on a Model A. Not enough usually for a more modern trailer tire or the like that has bonded itself to the wheel over time.
Just put it between the tire and the wheel and give it a couple wallops with a 3 pound hammer.
It's about a foot long and weighs a couple pounds. Made by Ken-Tools.