This technique is used to break the elbow joint, wrist or ankle. It can also be employed to block a coordinated hand and foot attack to the solar plexus and lower abdomen. Both sitting and walking stances are chiefly used, although a close, parallel or x-stance can also be used. If the right forearm is the lower one, it is called a right 9-shaped block and vice versa. A reverse block with a walking stance is normal.