It's called a watch driver and a glasses drive.
It is a small screwdriver that tightens the glasses screws.
What's good?
I'm thinking of using it to tighten the glasses screws.
It may be a bit expensive, so please recommend a good product~
773 2015-06-22 Gentleman
There are many made in China. You can search on the Internet and use it.
Drivers can't be too expensive.
Plus, once you buy it, you can use it for a long time.
I also recommend it in Japan.
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