The crescent axe-blade of this polearm is attached to the haft at two points: the center of the blade attaches to a socket at the top of the haft, and the lower point of the blade attaches to a secondary mount point. The blade is often very long, sometimes almost as long as the haft.
You gain a +2 bonus to your CMD to resist sunder attempts made against a bardiche.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.