In the Ki Focus weapon enhancement section, it makes reference to the "monk's stunning attack...as well as the Stunning Fist feat".
I think this may be a relic of 3.0, as in 3.5 the Monk's stunning attack is actually just the Stunning Fist feat. Also not every monk gets the Stunning Fist feat, so removing that part of the entry would clear things up a bit.
Jayef
