As a professional dog groomer and vet tech, I have these files everywhere and keep a supply on hand at all times. After clipping nails, I use these to eliminate rough edges and catches, as well as smoothing the freshly cut surface. They are also a great tool for those pups who dislike having nails trimmed, but will sit still while I am gently filing. These work great with little pressure and can actually be washed/disinfected a few times before needing replacing. Simply wash with warm soap and water as if you're washing your hands. They dry quickly without warping.