later These are HSS bits. Good price - good results. You want great results and longer life - Carbide, you pay a lot more for that great result. Perhaps domestic or European HSS drills offer some advantages in terms of geometry or chip handling, but in the end Chinese drills are hard to beat in terms of price per hole. They can be sharpened. This is best done at a source that has a resharpening tool, but a man with a good eye, equipment, and a little patience can do it. It's the Chinese. I betβ¦