pinned-in-back) is a Korean traditional ornament used to decorate ladies' chignons, and it has a sharp end.
When ladies stick the dwikkoji in their chignon, it functions as jewelry adorning their hair.
[2] The different types of dwikkojis correspond to social status: some are for royalty, others for nobility and others are for ordinary people.
The most common dwikkojis for ordinary people are called bichigae (빗치개, comb-type) and guiigae (귀이개, earpick).
They are usually made of silver, and they both have elements of fanciness and practicality.