Gawagane is also heated, and struck and elongated to become twice as long as the Core metal, and is then cut in the center to make two Gawagane of the same length as the Core metal.
側金も加熱され長さが芯金の倍になるくらいに叩き伸ばされ中央から切り離されて、芯金と同じ長さの側金が2本作られる。