Craftsman open end wrenches are basically crap. They are stamped and the edges are sharp. Work all day with these and you will get a raw spot in the center of you palm. Their box end wrenches are ok but the open ones are worthless, esp. in you make your living turning wrenches.

Auto parts stores often sell tools that are make by major manufacturers and cost 2/3rds. of the name brand. My local sells Blackhawk which are made by Proto.

Barry is right about twisting off the lines. I live in S. Texas on the water and the rust is a big problem. I have had to twist off many brake lines. If the line is basically ok you can cut it back a ways and add a short piece of new tubbing using a coupling.

If you have drum brakes just twist off the line, remove the cylinder, and install a new one. If you have disk brakes twist off the line, grind off the stub of brake line left in the brake line nut, then tap the nut for a minute or so with a small hammer while spraying WD-40 or the like (not hard-you just want to vibrate the nut enough to break up the rust and cause the oil to down the threads). Put a socket of box end wrench over the nut and just rock is back and forth gently. Don't hurry it! Just rock it back and forth, spray some oil and go at it again. Once you get it to move just a little it will come out.

If your lines are that rusty and the nuts are frozen up God knows what is inside the calipers. It might be time to replace them. If so don't bother to remove the nut.

Good luck.