Why are these called 5 way binding posts? I count four!

I'd call it 3 way, bare wire, (in a hole or wrapped around) are the same damn thing really.

Not the same if the hole is missing....

Anything more than a 3-way I'm too old for.

Pretty sure the post is just bragging about its abilities. 

Is Skyline Chili involved in this?

Bare wire, pin, spade, banana and diced onion?

The fifth one is wireless