I've kept this in my medicine box since I bought it, and I've never used it. It has a safety guard to prevent over-insertion of the nail between the blades, ensuring a safe design that prevents cutting too deep. By catching the skin at the tip of the finger, you can cut your nails to the perfect length. It features a "straight blade & vertical blade placement" that is gentle on children's soft nails. It also comes with a catcher to reduce the scattering of cut nails, making it easy to clean.