Hi, guys I'm new here and I need some help.

I have a '90 Honda Civic DX (Hatchback of course)
I'm trying to remove that bolt off my car. But like I've read other places it's pretty difficult. I just bought this tool:
http://www.autopart.com/TOOLS/TOOLSMAIN/tool/T_A812.htm
But I'm not sure how I should use it exactly. Any help is appreciated. THanks.