Iron bamboo (黒金竹 Kurogane Take?) is the general and primary material used for crafting Military weapons, namely the vertical maneuvering equipment. Iron bamboo is notably made out of iron ore absorbed from the ground, however the components of this special iron are unknown. Granted, the iron in the bamboo is possibly part of a brand new alloy. Unlike other metals, iron bamboo has the most potency when used against Titans, being the only known metal to-date that is able to cut through a Titan's flesh. Iron bamboo is exceptionally sharp when molded, and it is an incredibly strong plant, as shown when Jorge Pikale attempted cutting a stalk in half with his iron sword, but failing.