I am installing SS brake lines and new brakes on my 99 maxima, and reading the how to on Maxima.org it states I will need a 10mm flare nut wrench, is this really neccessary?

Can someone explain the difference between combination wrenches and a flare nut wrench, and if I can just use a regular wrench?

Thanks in advance.

99 Mystique LS T-Red ATX Duratec Mods: Hella stereo Mods K & N air filter w/intake pipe www.sounddomain.com/id/jongordo8