Thanks to my knowledge gained in practice, I would strongly advise against purchasing this bit. While it may work for occasional use on softer surfaces, it simply cannot withstand the demands of heavy-duty industrial drilling. The one pro is that it is affordable, but that is quickly negated by the fact that it wears out far too quickly, making it a waste of money .If you require a reliable and durable bit, keep looking as this one is not up to the task..