It is not so sharp and it has a lot of heat because it has a high repulsion resistance. It is slightly inappropriate for drilling with a small amount of screw thread at the tip. If the hole is large, the forceer bit is recommended, if it is less than Φ 30 mm, the C type bit is recommended. However, it seems that C type bit is not handled by Monotaro. I would like you to come into inventory by all means.