Two layers of color-covered glass are made by hand one by one, and the instruments are engraved by hand to express the pattern with contrast of two colors.
It is said that "Tora goes to 1,000 and returns to 1,000," which means excellent action power, and it is also said to represent the depth of the bond between parents and children that parents who hunt return to the child left in the burrow even on the 1,000-ri road.
