I was first introduced to glass nail files a few years ago through Bare Hands’ Dry Gloss manicure kit, and ever since then, my natural nails have never looked better. Most manicurists have sworn by glass files for years, thanks to their ability to shape nails without snagging, but I had no idea that the right tool could actually prevent me from damaging my nails and help them grow. Recently, I was traveling and broke a nail; instead of picking at it, I ran to the closest beauty store and picked up a glass nail file to reshape and prevent further damage. The one I found? Ulta Beauty Collection’s version, which came in a travel-friendly sleeve perfect for keeping in a makeup bag or purse for on-the-go use. It also turned out to be the best impulsive buy for my natural nails. Read ahead for a deep dive into the benefits of glass files — and exactly why they’re worth the investment.