A single underhook can be used as a takedown maneuver.3 The protagonist underhooks one arm of the opponent and extends his underhooking arm partly or mostly across the opponent's back, while using his other hand to pull the opponent's other elbow across the opponent's body, and drives forward into the underhooked side of the opponent.
The double underhooks are considered one of the most dominant positions in the clinch, primarily because they allow for great control of the opponent, and can be used for doing a takedown or throwing the opponent. The double underhooks can be used to advance into a bear hug by locking the hands behind the back, and holding the opponent close to the chest. The opponent typically responds to double underhooks with double overhooks, to prevent the opponent from advancing into the bear hug.
Chris Wright-Martell (2011). Knack Self-Defense for Women (PDF). Globe Pequot. p. 78. ISBN 9780762768288. 9780762768288 ↩
"Definition of UNDERHOOK". Merriam-webster.com. Retrieved 3 March 2022. https://www.merriam-webster.com/dictionary/underhook ↩
Inc, Active Interest Media (3 December 2001). "Black Belt". Active Interest Media, Inc. Retrieved 3 March 2022 – via Google Books. {{cite web}}: |last= has generic name (help) https://books.google.com/books?id=tc4DAAAAMBAJ&dq=Underhook&pg=PA11-IA16 ↩