Engine Help! Boss 302 Oil Cooler Install Question? 9/16 oil filter thread bolt

I have purchased a boss oil cooler for my ride. I had a question regarding the oil filter thread bolt. I called ford racing and have seen in a write up that it requires a long 9/16 hex driver. I now have two of these tools and neither of them fit.

Any one had any issue with this?

Any one had success with a 9/16 hex driver?

I think the part has not been successfully machined.

Well it turns out its a 14mm and harbor freight sells a set which includes a 14mm at a reasonable price if anyone is looking in future, plus there's always a 20% off coupon on-line or in the car magazines to be had.
See
http://www.harborfreight.com/8-piece-12-drive-metric-impact-hex-driver-set-67895.html

Ford Racing told me this was 9/16. I found the correct answer on another forum after posting there.