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.
No.120 is used especially when the sword is rusted heavily.
We have "Medium Hard" and "Hard".
Please select the hardness.
Dimensions : 20 x 5 x 5cm
Weight : 960g
