The DEWALT DW5471 bit is a disappointment. As a result of my tests, I determined that it isn't capable of cutting through materials as it claims. The only positive thing about this product is its carbide tip. As for the negatives, it's just a waste of money. It's an expensive bit that is better off being used to decorate your toolbox. If you're looking for a reliable and efficient industrial and scientific cutting tool, This is not the one for you.