Learn how hyel do sul (vital point techniques) can be used with self-defense techniques to stop an aggressor. This is a detailed account of what happens to an opponent when hyel do techniques are applied. Featured are: "tong hyel" vital points which induce pain, "ma hyel", vital points which may cause paralysis, and "sa hyel", lethal points of the body, which may cause death. Grandmaster Benko presents a practical approach for making self-defense techniques effective. Includes 30 hyel do Targets and Descriptions, plus 22 Vital Point Charts.