Search: “standard inside knife hand strike”

The basic ridge hand technique swinging the hand inward with the thumb tucked, striking with the inner edge of the hand between the base of the index finger and wrist.

The fundamental ridge hand strike using the inner edge of the hand near the base of the index finger, swinging inward to strike the temple, jaw, or neck.

The fundamental ridge hand strike swinging the inner edge of the open hand in a wide horizontal arc, targeting the temple or side of the head with centrifugal force.