Drill Bits Cobalt Pro Grade. Cobalt Drills Are Designed To Cut Through Extremely Hard Metals, Including Stainless Steel. No Center Punch Needed: Century 135 Degree Quick-Cut Points Are Self-Centering And Penetrate Faster With Less Pressure, Will Not Walk Or Wander At The Starting Surface. Extremely Heat Resistant, Must Be Used And Operated In Power Units That Have A RPM Speed Of 1.500 Or More For Maximum Efficiency. Aerospace Naps 907-J Specifications. High-Quality Cobalt Construction for Durability: Made from premium cobalt, these drill bits are built to last, offering exceptional durability and longevity for all your drilling needs, especially on extremely hard metals like stainless steel Ideal for Extremely Hard Metals: These cobalt drill bits are specifically designed to tackle tough materials, including stainless steel, ensuring reliable performance even in the most demanding applications Precision Point Tip for Accurate Drilling: Each drill bit features a precision point tip, allowing for easy, accurate drilling without slipping or wandering, making it perfect for projects that require clean and precise holes Perfect for Heavy-Duty Use: Designed to withstand the rigors of heavy-duty use, these cobalt drill bits are ideal for both professional contractors and DIY enthusiasts working with hardened metals like stainless steel Drill Pod Set Includes: 1/16″ to 1/2″ by 64ths pro grade drills.