A round to it

Recently, someone handed me this at work... a piece of metal with "2 it" written on it.

It's about the size and shape of a nickel.

I said "what's this?"

He said "a round to it"

I said "what's a round to it?"

He said, "you know– whenever you “get ‘round to it” there it is for you!"

"oh, i get it"