A distinct category of Ridge-hand Strike which is physically distinguishable by striking with the inner wrist of the hand on an inward trajectory.

Comments:

The word diagonal is used to refer to the most common way in which this maneuver travels, although technically, it does not have to strike diagonally.

From a technical perspective, this maneuver is distinct from the ridge-hand due to its contact point.

From one perspective, this maneuver is basically the reverse of the hand-sword.