I bought a joggler off amazon, Tried to use it, Not sure if it was faulty or just cheap as it didn't make the step I was expecting it to and now it's gathering dust in my draw.
There only seems to be a couple of makes All the rest clones the air one we had was years ago (40+) but looked like a Clark unit our shop line ran 150\60 Psi
Although I only use it a few times as I prefer to butt weld I liked the rolastep tool as it gives a nice continuous step not lots of small steps joined together.Use it with a ratchet so not air or electric powered but I suppose you could use it with an air ratchet.