What tool is used to cut the steel buckle of the bottle mouth?

Bottle mouth cutter. It is convenient to cut ampoules by machine, and the steel buckle is directly grinded, which is matched with the bottle mouth cutter for ampoules. 1858, Izra Warner, an American, obtained the invention patent of bottle opener. Later, people improved it continuously. The "appearance" of the bottle opener is still very strange, but it is still the same, and the principle is still the lever principle.