a. Don't own a nail file or
b. Own a file but its an emery board or even worse a metal nail file.
These crystal files are made from toughened glass and lead crystals which is what gives them this cloudy look. But never mind that, with these files you can see saw away your nails to dust and they actually work to seal the edges of your nail. So no more microscopic snags and tears that can hook on to clothes and hair. There's also no abrasive feeling to them so no more gritting your teeth when filing.
A world class file worthy of this weeks Friday Favourites title.
Prices from £12 - £15. Available from http://www.leightondenny.com/