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 am 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 is the real thing as far as i can determine most of the low cost files are not acceptable nice little individual protective cases though