What is this metal object that Nino is rubbing against her face in Gotoubun no Hanayome?


See the picture for what I'm referring to. At the end of S02E03 of Gotoubun no
Hanayome (aka Quintessential Quintuplets), Nino is lounging around in her
residence, rubbing these metal-looking balls against her face.

What is this? My guess is it's some female-skin-care product, but I have no
actual idea @.@.

[![enter image description
here](https://i.stack.imgur.com/vzTxV.jpg)](https://i.stack.imgur.com/vzTxV.jpg)




It is usually called _Small Face Roller_ (小顔ローラー) or _Beautiful Face Roller_
([美顔ローラー](https://www.amazon.co.jp/s?k=%E7%BE%8E%E9%A1%94%E3%83%AD%E3%83%BC%E3%83%A9%E3%83%BC&ref=pd_sl_62blw487x7_e),
link to amazon.jp).

Personally I feel it is rather dubious whether it has any effect at all, but
according to [here](https://toplog.jp/355270) for example, it is supposed to
_prevent hanging skin, improve blood circulation, or soothe swollen face (by
fatigue)_. Either way you are right in that it is a "beauty apparatus" mostly
for women.

Sorry if the wording is not clear, I have little idea on the right term for
the symptoms.




It is usually called _Small Face Roller_ (小顔ローラー) or _Beautiful Face Roller_
([美顔ローラー](https://www.amazon.co.jp/s?k=%E7%BE%8E%E9%A1%94%E3%83%AD%E3%83%BC%E3%83%A9%E3%83%BC&ref=pd_sl_62blw487x7_e),
link to amazon.jp).

Personally I feel it is rather dubious whether it has any effect at all, but
according to [here](https://toplog.jp/355270) for example, it is supposed to
_prevent hanging skin, improve blood circulation, or soothe swollen face (by
fatigue)_. Either way you are right in that it is a "beauty apparatus" mostly
for women.

Sorry if the wording is not clear, I have little idea on the right term for
the symptoms.

