Mediaeval and modern bows generally have integral wooden siyahs and lack stiffening laths. It is assembled from interlocking laths of wood or bamboo called kumiko. For partitions metal laths are grouted in with semi-fluid plaster. Individual laths were riven and nailed in place. Both horn and laths may be bound and glued with further lengths of sinew. Stiffening laths, if used, are attached. The wall or ceiling finishing process begins with wood or metal laths. More distinctively, the grip of the bow was stiffened by three laths. The mineral occurs as thin laths or plates or small aggregates up to . Crossbows with steel laths were sometimes referred to as arbalests. There are not nearly as many low angle boundaries between laths in lower bainite. Laths were formerly all made by hand.