[b]stuey (11/26/2013)the 37* version is for the later AN (army and navy??) fittings utilising the stainless tubing.
To avoid confusion, the 37 degree flare is not limited to stainless. It can be steel or aluminum. If your vehicle is stock, all of the flares are 45 degree and the brake lines use a double flare.
I can't recommend a tool but I think you are on the right track. The ones you typically find at the parts store are junk.
Lawrenceville, GA