During this process, worker adjusts the amount of power to each hanger, because each natural wood has different individual character.
When inserting the hook, it must be placed parallel to the hole.
The required power to insert depends on density and hardness of wood, so worker must have a skill to distinguish and adjust the difference.
Some skillful craftsmen have this high ability, so they work very fast.
This work is done by hands not automatically.
Also our department staffs have to inspect all hangers with our hard eyes.
Using a thick hook gives a hanger durability and feeling of luxury.
Durability is essential for suits hangers, as a hanger has to support the weight of the set of suits