For over 50 years, I realize that my hands are pretty damaged and require care. Not a fan of varnish nor fireworks, however the minimum required. Two visits a manicure return quite expensive, as much pampering oneself. At reception, I hesitated a bit: quite heavy object seems a bit "too much" for the nails. Still, the material is hygienic, easy, after trial and error. A tutorial on the Internet and a little daring departure. Then the first result satisfied me enough. Does its job! The cutting side actually is perfectly safe but being careful. I work with a strong magnifying glass, time and an ad hoc preparation. No injury. Very good tool. I take just as much as are excellent.