Bests & Worsts Reviews from Amazon

I am a guitarist and needed quality files to keep my nails in good condition for playing. I had read about crystal nail files and that they were highly recommended for nail upkeep. I received the files and they looked like the picture but they were neither in a velvet pouch, had no Mont Bleu marking, and whether they were tempered glass or not is immaterial, as the files wore out within a week!!! Avoid at all costs!!!!