These cobalt twist drills are made of very hard steel that is used especially in high speed tools. These twist drills will drill through stainless steel, chrome-nickel, and other hard metals. They are particularly ideal for drilling platinum. And they last up to 30 times longer than standard drills!
- Made of very hard steel
- Stainless steel, chrome-nickel, and other hard metals
**It is highly recommended that you use water or coolant when working with these drills**