Tool to remove Rotor Bolt?

Anyone know what tool I need to remove the Rotor bolt of my 98 Ford Explorer?

It looks like a large hex nut but I didn't run to the store to get a giant hex set because it looks like it will also need to fit into a limited space. In addition, I'd guess I'll need something with a lot of torque to remove the bolt. Finally, when I am turning the bolt, do I need to do anything to keep the drive train from turning? [It looks like it might just turn the entire drive train instead of loosening the bolt].

Thanks for the help!

you can find that tool at an auto stroe, theyll rent it to you, im pretty sure 94 and 98 is a big difference, but i have a hex nut holding my rotors to, i didnt really need the special tool, i read that they shouldnt be so tight taking or putting back on, theres a steel pin preventing the bolt to loosen on mine.