The Comb Drill & Ctsk Rad # 4-0 from KEO is engineered for precision drilling and countersinking in a variety of materials. This tool combines the functionality of a drill and a countersink, making it ideal for applications in both metal and wood. With a size of #4-0, it delivers exceptional performance, ensuring clean holes and smooth finishes. Constructed from high-speed steel, this drill offers durability and resistance to wear, while its precision-ground edges enhance cutting efficiency. Perfect for professionals and DIY enthusiasts, this tool is a reliable addition to any toolkit.