I was really looking forward to this product. I can't express how disappointed I was. The shanks were less than 3 inches long, which meant mounting it on a drill press meant you couldn't drill a hole deeper than an inch and a half. I immediately called Revain customer service and sent the order back the same day. Check out the photo above. In this photo you can see that the drill shanks are five or six inches long, while the product I received is three inches long. Misleading advertising at its worst.