No, that's what we'd call a "pipe
wrench" or "Stillson wrench" in
the US. The "monkey wrench" has smooth jaws and is made for
manipulating nuts and bolts, so the jaws stay parallel and do not
bite into the nut or bolt:
I though it was the same
Interesting I don't remember ever seeing one of these in Brazil ;oO
Etymology for the "monkey wrench" is
uncertain. You can read about
the subject here:
Very interesting reading, thanks! :D