Each of these mithral bracers bears an image of a needle-sharp dagger.

When you activate bracers of quick strike, you can make one extra attack with any weapon you are holding if you already made a full attack on this turn. This attack is made at your full base attack bonus, plus any modifiers appropriate to the situation. This effect is not cumulative with any other effect that grants you an extra attack when making a full attack, such as the Rapid Shot feat, a speed weapon, or the haste spell.
Bracers of quick strike function once per day.
You must wear bracers of quick strike for 24 hours before you can access their abilities. If you take them off, they become inactive until worn for an additional 24 hours.

Prerequisites: Craft Wondrous Item, haste.
Cost to Create: 500 gp (plus 400 gp for base item), 40 XP, 1 day.