gcarter
Contributor
From my experience the straight fluted easy outs http://www.google.com.au/url?sa=t&rct=j&q=straight%20flute%20screw%20extractors&source=web&cd=2&ved=0CEQQFjAB&url=http%3A%2F%2Fwww.icscuttingtools.com%2Fcatalog%2Fpage_205.pdf&ei=J0CKT5-IOpDKmAXGpI3CCQ&usg=AFQjCNGLuZuGyXHXZXGEQNMSBvLBRBZyxQ&cad=rja are much more effective than the spiral fluted. They are essentially a tapered square profile with sharp edges. You hammer them into the hole rather than screwing them in.
I have generally had better success with them as well. I even occasionally keep ones that have broken - sometimes it makes it easier to hit the sweet spot taper / depth limits.
Finally, if you snap the easyout off in the hole... just walk away.
Truly. It is for your own sanity.