Weapon Specialization

Type: General, Fighter
Source: Player's Handbook

Choose one type of weapon such as greataxe, for which you have already selected the Weapon Focus feat. You can also choose unarmed strike or grapple as your weapon for purposed of this feat. You deal extra damage when using this weapon.
Prerequisite: Proficiency with selected weapon, Weapon Focus with selected weapon, fight level 4th
Benefit: You gain a +2 bonus on all damage rolls you make using the selected weapon.
Special: You can gain this feat multiple times. Its effects do not stack. Each time you take this feat, it applies to a new type of weapon.