When making a full attack action, the wielder of a speed weapon may make one extra attack with it. The attack uses the wielder’s full base attack bonus, plus any modifiers appropriate to the situation. (This benefit is not cumulative with similar effects, such as a haste spell.)

Prerequisites: Craft Magic Arms and Armor, haste.
Cost to Create: 9,000 gp (plus 300 gp for base item), 720 XP, 18 days.