This is a stone mill. What does it handle?

This kind of grinding wheel is used to grind food at high speed, which is very convenient for home use. But when grinding food with a grinding wheel, I always feel that there will be some scraps of grinding wheel in the food. I don't know what effect it will have on my health if I use it too much. I suggest using a natural stone mill, which has been handed down for thousands of years. It should be relatively green and healthy, some small ones for home use, and some large ones for commercial use.