This article, Earth Release: Fist Rock 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: "Earth Release: Fist Rock Technique".
By encasing their arm in rock, the user can deal a powerful hardened punch against an opponent while being protected from direct contact with their target. If necessary, the weight of the rock can be increased to further increase the punch's destructive power.