At the finish,

the arm is in precisely the same position as in the outer block. However, it begins with the fist palm downward at the ready position on the opposite side of the body and the striking surface is the inside edge of the forearm.

Gedan-barai (downward sweep). Another strong defensive technique, useful against attacks to the solar plexus, stomach or groin (gedan), and particularly employed against kicks.

The fist is carried to a point near the opposite ear, palm facing the ear, then swung diagonally downward. At the finish, the arm is extended in front of the body and the fist twisted palm downward. Strike the attacking arm or leg with the outside edge of the forearm and to avoid damage to the wrist be sure to clench the fist as tightly as possible.