And his sharp, man-eating teeth (hence the "tiger" part):
Being the '40s, he was required to don a fedora and top coat before kicking a man to death.
So, despite his disability (disabilities, if you count his face), Armless Tiger Man is actually quite resourceful -- he single-footedly manages to sabotage at least one factory and knock out several people using the limited gifts God saw fit to bestow upon him. He truly is an inspiration to cannibalistic double amputees everywhere.
They were all so moved by his spirit of perseverance that they just let him knock them out and eat them.
Armless Tiger Man is eventually arrested by the Angel, an obscure superhero whose only notable superpower, for the purposes of this story, is having arms. Since then, he has only been used in a handful of other comics. Ironic that a character about making the most of what you have should end up as a wasted opportunity.
"Enjoy turning the pages."