I have actually used a couple variants of this thing
It's a metal band tensioner and cutter. Usually used to secure something to a post that you have no intention of removing for the foreseeable future.
That looks like a band-it strap puller/tightener.
I forget what the actual name is, but it can latch onto a metal strip and pull it tight around some digs to keep boxes and canisters in place, or to hold a strong back repair plate on a damaged pipe
I don't know the name, but it's a tool to tighten a steel band.
Correct but beaten slightly to the punch by the other guy.
Wild guess: a tool for manually shaping iron rods or rebar?
Negative Wilco Rodger.