Your hammer blows dent armor, hampering your opponent.
Benefit(s): Choose one weapon from the axes, hammers, or flails fighter weapon group. While using this style, when you succeed at a sunder combat maneuver check against a suit of armor worn by an opponent, you can immediately attempt a bull rush or trip combat maneuver against that target with the same combat maneuver bonus. This maneuver does not provoke attacks of opportunity.
Pathfinder Player Companion: Weapon Master’s Handbook © 2015, Paizo Inc.; Authors: Alexander Augunas and David N. Ross.