You can make a quick, accurate attack at the expense of hitting power.
Benefit: You can choose to take a –1 penalty to all weapon damage and combat maneuver checks (to a minimum of 0) to gain a +1 bonus to all melee weapon attack rolls. This bonus to attack rolls is increased to by an additional +1 if you are fighting with a one-handed or light weapon in one hand, and have nothing in your other hand. When your base attack bonus reaches +4, and every 4 points thereafter, the penalty increased by –1 and the bonus to attacks increases by +1.
You must choose to use this feat before making any attack rolls, and its effects last until your next turn. The bonus does not apply to touch attacks or effects that do not deal hit point damage.