Finger Engraving Application Seal - a fūinjutsu technique in which the user concentrates chakra in the finger and, by virtue of the heat released, applies any letters or patterns to a surface. This requires very precise chakra control, as the slightest mistake will ruin the inscription. If the technique is applied to a living being, the target feels mild discomfort, and a scar remains on the skin, which presumably persists for the rest of their life.
