Yes, it was a six sided impact socket, but not an expensive one. It had a hard week. My efforts, the truck guys and finally the "bar test". I will replace it with a decent one.
I bought a cheap impact gun a few years ago and it has been great for all those big nuts on clutches, flywheels and sprockets. I feel I have had my $40 worth and then some. It came with a full set of sockets which at that price couldn't in anyway be described as "quality" gear.