Str 13, Improved Sunder, Power Attack, Two-Weapon Fighting, Weapon Focus (warhammer or light hammer), Weapon Focus (battleaxe, handaxe, or dwarven waraxe).
If you hit the same creature with both your axe and your hammer in the same round, it must make a Fortitude saving throw (DC 10 + 1/2 your character level + your Str modifier) or be dazed for 1 round.