Needs review
Source: Player's Handbook

Description: You are especially skilled at using light and dextrous weapons.

Prerequisites: Base Attack Bonus +1

With a light weapon, rapier, whip, or spiked chain made for a creature of your size category, you may use your Dexterity modifier instead of your Strength modifier on attack rolls. If you carry a shield, its armor check penalty applies to your attack rolls.

Special

A fighter may select Weapon Finesse as one of his fighter bonus feats. Natural weapons are always considered light weapons.