What is the best Dong Zi for grinding antelope horn, such as a millstone?

Let me tell you something! I have a fever. My father bought me an antelope horn, which is too hard. I used that saw to grind it (I'm sorry I don't know its name, I'm going to use it to grind tires and patch them before repairing them). I grind three grams at a time and drink it with warm water ... There are many ways to eat it: steaming, stewing, scraping it into silk with a knife ... very useful ... Good luck. ...