WEAPON FINESSE [Combat]

     You are especially skilled at using a certain weapon, one that can benefit as much from Dexterity as from Strength.  Choose one light weapon.  Alternatively, you can choose a rapier, provided you can use it in one hand, or a spiked chain, provided you’re at least Medium-size.
Prerequisite: Weapon Proficiency with chosen weapon,

BAB +1
Benefit: With the selected weapon, you may use your Dexterity modifier instead of your Strength modifier on attack rolls.  Since you need your second hand for balance, if you carry a shield, apply the shield’s armor check penalty to your attack rolls.
Special: You can gain this feat multiple times. Its effects do not
stack.  Each time you take the feat, it applies to a new weapon.