You can use your shield to protect yourself or a nearby ally from an attack.

<php>echo “<b>Prerequisites:</b>”;</php> Shield Focus, BAB +3
<php>echo “<b>Benefit:</b>”;</php> As an immediate action, you can grant an AC bonus to yourself or an adjacent ally equal to your shield’s AC bonus + 4 (if you use this maneuver on yourself, you only get the +4). You apply this bonus in response to a single melee or ranged attack that targets yourself or your ally. You can initiate this maneuver after an opponent makes his attack roll, but you must do so before you know whether the attack was a success or a failure. You gain one additional use of a maneuver per encounter.