The soft white plastic disconnect tools work great for fuel lines, They do not work well, Or flat don't work on A/C lines, They are too flexible. These work well,
http://www.otctools.com/newcatalog/p.../6517_2328.jpg,
http://www.otctools.com/products/disconnect_tool_set.
For A/C fitting wrenches.....4-angle thin wrenches are the most versatile
http://www.cornwelltools.com/webcat/...le-Wrench-Set#
If you think that's expensive, Price out a Snap-on set that's thicker & doesn't work as well.