Review title is Glass nail files are not all the same! [SEP] It took a while to find a quality glass nail file, one that had a finely-etched abrasive surface.  NOT this file.  This item has a rather rough surface, and I'm not sure that it is etched, as opposed to presenting a secondary abrasive adhered to the glass.  So far, the only file that meets my expectations is made by VAGA.  It's the real thing.  As far as I can determine, most of the low-cost files are not acceptable.  Nice little individual protective cases though...