After renting the "fan tool set" from the local auto-parts place I found that they never really fit correctly. Seemed like a sloppy fit and after a couple try's it just rounded the fan bolt and didn't always loosen the fan. That pic above looks like a nice set of wrenches!
I found this tool to help and always did the trick. It's an 1" and 7/16's box end wrench from the local tool place, in this case Tool King. It fits snug and with the belts still on, you slip it on the nut and give it a whack with a good size hammer on the rounded side, just to the right and away it goes, it has never failed yet. Just remember to leave the belts on so there is tension on the pulleys.
