For years, I have problems with Zehnageln that grow and every time I try to figure out the corners, breaking the nail and everything gets worse. I stumbled by accident on that corner Heber. I think they are just fantastic. You walk in the corners, can purify and lift corners and nothing happens - nothing cuts in by mistake and by the different sizes I could lift the soaked nails gently. After that I cleaned it with boiling water in a glass and they are super hygienic !!!!! I wish I would have found 20 years ago !!!!!!!!!! Just Great !!!