Artificial stone, substitute for Ara-to.
1st stone of the groundwork, used before Binsui-do.
Kongo-do is used when the sword has rust or flaw.
We have several types of Kongo-do, so please choose the one according to the condition of the sword.
Asahi Kongo-do No.180 Hard Type is good to hard swords such as Gendai-to.
Dimensions : 20.5 x 5 x 7.5cm
Weight : 1.4kg
