1. Leviathan series files use carbon ceramic as the raw material, the material itself has high hardness, but the corresponding will be brittle, please do not bend the file forcibly, do not drop the file from a high place to a hard surface (such as cement floor, marble surface) Wait);  2. Do not use hard brushes such as wire brushes, so as not to affect the service life of the file (please use a soft plastic brush for cleaning);  3. Please do not cut metal or we do not indicate the material that can be cut to extend the life of the file;  4. It is recommended to use the file every time and put it in a separate storage box to avoid collision with other sharp objects;