Jabbing Master

Combat

Your quick punches become even more lethal.

Prerequisite: Dodge, Improved Unarmed Strike, Jabbing Dancer†, Jabbing Style†, Mobility, Power Attack; base attack bonus +12, brawler† level 8th, or monk level 8th.

Benefit: While you use Jabbing Style, the extra damage you deal when you hit a single target with two unarmed strikes increases to 2d6, and the extra damage when you hit a single target with three or more unarmed strikes increases to 4d6.

Source: Advanced Class Guide