At 2nd level, a ranger must select a combat style. In addition to their normal choices, a ranger can also select the following new combat style. The ranger can choose feats from his selected combat style even if he does not meet the prerequisites. If the ranger wishes to take a feat that requires the Weapon Specialization feat (such as Impaling Critical or Point-Blank Master), he must instead have Weapon Focus with the chosen weapon instead.
Quarterstaff Combat Style (Ex)
Path of Iron, © 2015, Ascension Games, LLC; Author Christopher Moore