This weapon seems heavier than a typical weapon of its type, and its head and haft have a square design.

An impact weapon has double the threat range of a normal weapon of its type. For example, an impact quarterstaff scores a threat on a roll of 19–20, and an impact heavy flail scores a threat on a roll of 17–20. This effect doesn’t stack with any other effect that expands a weapon’s critical threat range.

Prerequisites: Craft Magic Arms and Armor, weapon of impact (SC 237).
Cost to Create: 1,000 gp (plus 300 gp for base item), 80 XP, 2 days.