Heavy Duty Cobalt Drill Bits Set 5/16 Inch M35 High Speed Steel Jobber Length 135 Degree Split Point For Hardened Metals Stainless Steel Cast Iron 10 Piece Kit In Storage Case

10-Piece M35 Cobalt Drill Bit Set, 5/16 Inch in Case
✔️ 5/16 in diameter (8 mm), M35 cobalt, 3 in flute, 135° split point

The 10 piece cobalt drill bit set is designed for heavy metalworking, delivering superior hardness and wear resistance. These bits punch through stainless steel, hardened steel, and cast iron in fabrication shops and workshop projects, while the straight shank fits most standard power drills.

✅ 5/16 inch (8 mm) diameter
✅ M35 cobalt alloy with 5% cobalt for wear resistance
✅ 3 in flute length (76.2 mm)
✅ 135-degree split point reduces walking and speeds drilling
✅ Jobber length for better rigidity and deeper holes
✅ Includes index storage case for easy organization

💡 What is a cobalt drill bit used for in metalworking and fabrication projects?

In metalworking, cobalt bits are handy for drilling hard metals that heat up quickly. They excel in tough jobs and help you finish faster. - handy for stainless steel, hardened steel, and cast iron due to heat resistance
- maintain sharpness under high heat with proper speed and lubrication
- compatible with standard drills via straight shank for easy use