The core of the hollow cold forging part is a method that dramatically reduces material and process costs by implementing parts requiring holes inside in a cold forging process without the use of a conventional drilling machine.
Bongil Metal is a leader in hollow forging not only in Korea but also around the world.

If there is an outer shape, it is implemented in a forging process as close as possible to the shape part and only a part of it is processed, so it is innovative in cost, so if many customers adopt it, they pursue this production method.