Source Core Rulebook pg. 283
Attacks with this weapon are nonlethal, and are used to knock creatures unconscious instead of kill them. You can use a nonlethal weapon to make a lethal attack with a –2 circumstance penalty.

Monk Unarmed Attacks

Crane Wing, Dragon Tail, Falling Stone, Iron Sweep, Lashing Branch, Tiger Claw, Wind Crash, Wolf Jaw


Daze, Phantom Pain, Retributive Pain, Savor the Sting


Blowgun, Fist, Sap, Whip