This is a replacement for the same tip that broke while going from large to small diameter. Most HSS bits are perfectly capable of surviving the occasional metal clip in their path, but not this one. To be honest, I'm not sure if the Chinese copies are any better. The delivery wasn't very good either. When I got a notification that the package was delivered, I couldn't find it at home. I replied "shipped to wrong address" and got a quick reply that it was on my back porch. Well, it wasn't either. I finally found it by the back door of my neighbor's garage, but at least I have it now. Let's see how durable this one is.