Parts of the Hand Jack Lobban August 21, 2020 Sonbadak – Palm of the Hand – A great technique to use in school defence as it can be used to the solar plexus and can cause enough damage to stop the attacker continuing with their attack. when utilising this technique contact is made with the palm of the hand and is most potent used in a forward motion similar to a punch. Pyung – Heel of the Hand – Similar to the Sonbadak however, the wrist is now flexed and contact is made with the heel of the hand. For this reason the Pyung is a more potent tool as it is now reinforced with the wrist and forearm. This technique is most practical in an upward movement.