Sephora’s glass nail files are now available from either Sephorah or Amazon for $3.00. This is probably the best inexpensive nail file on the market. It kicks any metal file I’ve ever used all the way into the gutter. Buy a half dozen. They make great, practical gifts for any gender.
P.S.: Note the word “glass.” They will break if you drop them on a hard surface. Don’t whine. You’ve been warned. If you manage to keep from being clumsy, they last for years.