D&Dtools1

Benefit

You treat the orc double axe as a martial weapon, and you gain a +1 bonus on damage rolls when making an attack with a battleaxe, greataxe, or orc double axe as part of a charge. If you have any of the following feats for the battleaxe, greataxe, or orc double axe, you can apply the feats' effects to all three weapons: Improved Critical, Weapon Focus, Weapon Specialization, Greater Weapon Focus, or Greater Weapon Specialization. Additionally, when you spend an action point to infl uence an attack roll made with either a battleaxe, greataxe, or orc double axe, you also add the result of the action point roll to your damage for that attack.