In the PRC implementation of the Fist of Hextor class, on levels 1, 4, 7, 10, etc., you choose either the Brutal Strike Attack or Brutal Strike Damage feat to get +1 to AB or +1 to damage, respectively. However, if this reference is correct:
http://dd3.ifrance.com/fist_of_hextor.htm, you should just automatically get a Brutal Strike feat at those levels and you can switch it from an attack bonus to a damage bonus and back again on the fly. I don't have access to the sourcebook for this class, so: is that reference correct? If so, I'd like to change the PRC implementation to match it.