Here is a 6&3/4"Edlund Company IncKING SIZE TU WayOpens Bottles, Punches CansBurlington Vermont
Has FRYMAX on the opener end.I believe this was an advertising opener for Canned frying Oil.
They dont make these heavy duty openers like this anymore.This thing is STOUT!This one has some surface Rust spots and will benefit from a good cleaning.STILL A GREAT OPENER that will last your lifetime and BEYOND!