A blonde goes to a auto parts store

3 1/2 inches in diameter.

“What does it do?”

She says, “I don’t know, but it’s always been there.”

One of the guy gives her a note pad and asks her if she can draw a picture of it. So she makes a circle about 3 1/2 inches in diameter and in the center she writes 710.

The guys on the opposite side of the counter are looking at as she writes it…and they continue reading …