A distinct type of punching strike which is physically distinguishable by striking in a linear, forward direction - making contact with the front of the first two (2) knuckles of the fist, palm pointing inward.

Comments:

This strike is most typically effected on a relatively horizontal line, but may be executed on a slight upward or downward slope, depending upon need.

This strike is a safer option for higher punches at or above the shoulder.

By definition, this strike either uses a Thrusting (or Snapping) Method of Execution.

The word vertical, in this case, refers to the orientation of the fist being vertically oriented in relation to its horizontally oriented counterpart - the straight punch.

This is essentially the linear version of the roundhouse punch or hook punch.