A round finish, which is said to be used in certain sports.
It's made of carbon steel which enhances killing power and provides high hardness.

For each refine level, increases Duplex Light damage by 3%.
For each 2 refine levels, ASPD +1.

When equipped with Illusion Muffler:
ASPD +10% (reduces after attack delay by 10%).

When refine Level of Illusion Iron Driver and Illusion Muffler each is +7 or higher:
Increases Duplex Light damage by 25%.

If total refine level of entire set is +18 or higher:
CRIT +15.

If total refine level of entire set is +22 or higher:
Increases critical damage by 20%.

Indestructible in battle

More Information on Combo:

• Illusion Iron Driver[2] & Illusion Muffler[1]