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Title: Read about them on Amazon
Review: I had never tried a crystal nail file until I read about it on Amazon. I was looking for the old fine diamond dust metal ones that I've used for 40 years.....but they are not to be found. This is a close second to those. My only reservation is that this one IS glass and you have to be careful not to drop. It is also thicker than the metal ones and so not quite so easy to handle. Soooo much better than the paper based emery boards which wear out after one or two uses.
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