That's a quarter in the top photo, and it's just for size reference, for the smartasses and rah-tards out there. :hihi:
While replacing a water-pump, a pin spanner wrench, was needed to remove the fan. It looked pretty similar.
One post. One post? Well phuck a duck. :hihi: Close enough I guess. It was actually off of an angle grinder.
The easiest way is to find a photo on the net, copy its address, then use the "insert image" button to post the photo.