The user and their ninken partner spin at a ferocious speed and deliver many powerful beast-like attacks when contact is made with the target. The force of this attack is strong enough to drill through stone. Originally this attack required the user to first preform Beast Human Clone, higher level users don't have this disadvantage. This attack can be done alone.
The full name of this technique is Beast Human Taijutsu Secret Art: Fang Passing Fang (獣人体術奥義・牙通牙, Jūjin Taijutsu Ōgi: Gatsūga, Literally meaning: Beast Human Body Technique Secret Art: Fang Passing Fang).