Don't let anyone fool you that any old nail file will do. I file everyday to keep sharp edges at bay, thereby reducing the damage done to skin when scratching. I've had nail files snap in half mid-use, turn into a pile of dust after a week and even made my nails feel sharper! The Sephora Collection Nail Files are the best I have found for smoothing away those sharp edges easily, without leaving behind a snag or having to saw back and forth for ages. They are also the most durable I have found so I don't have to replace them as often. I stock up on these whenever abroad at a Sephora (they come in packs of 2) and a very good alternative available in the UK are the QVS Pro Nail Shapers.