After having taken on the properties of Ash, the user will turn their forearms into massive, three meter long rotating drills. Their rotation is so fast, only those with the highest level of Doujutsu can possible hope to follow. Without hindering the users movements, they will attempt to pierce an object or person with the drills. Coupled with the heat, rotation and the fact the user can keep the point from blunting, the drills are capable of piercing almost any non chakra enforced substance, wood, metal, diamond given enough time. When coming in contact with a person, it will tear their body to pieces. What makes them so dangerous is that any part of the drill can grind a person to pieces, meaning they can be swung instead of thrust. However the technique is weak and can be countered by Suiton, thick Doton defenses and chakra infused weapons.