This article, Claw Creation Technique, contains content taken directly from our mother site. All credit of such content is reserved the original authors over at Narutopedia, the original article can be read here: "Claw Creation Technique".
This technique allows the user to temporarily enhance the normal growth of the nails on both their hands and feet, causing them to grow considerably longer in a short space of time as a result. It also seemingly enhances the durability of the nails, allowing them to even clash against swords without breaking.
