Sneak Subdual

Sneak Subdual (General)
You can make sneak attacks that subdue your enemies.
Prerequisites: Sneak attack +1d6, base attack bonus +1.
Benefit: You can use a weapon that deals normal damage to deal nonlethal damage in a sneak attack, with the usual –4 penalty. Alternatively, when sneak attacking with any bludgeoning weapon, you can elect to deal half normal damage and half nonlethal damage (round down) with no penalty.
Normal: Sneak attacks can only deal nonlethal damage if made with an unarmed strike or sap.

Sneak Subdual

Glimpses of Hyboria Elfbane