Weapon Focus

base attack bonus +1, Proficiency with selected weapon,

You gain a +1 bonus on all attack rolls you make using the selected weapon.

You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a new type of weapon. A fighter may select Weapon Focus as one of his fighter bonus feats (see page 38). He must have Weapon Focus with a weapon to gain the Weapon Specialization feat for that weapon.

Choose one type of weapon, such as greataxe. You can also choose unarmed strike or grapple (or ray, if you are a spellcaster) as your weapon for purposes of this feat. You are especially good at using this weapon. (If you have chosen ray, you are especially good with rays, such as the one produced by the ray of frost spell.)