It looks like its designed to handle heat. It has feet, so we are looking at it upside down. The small hole looks like its for a handle to be inserted like a outdoor grill grate wrench. The large hole is interesting and could be just for letting the heat through or it could be designed to hold a cup or at least a round bottom vessel, like one to melt lead. It's design appears to be to keep your hand away from the heat and for balance. The 43 means something, I don't know.
Cool item to figure on, thanks.