MILWAUKEE RED HELIX COBALT DRILL BIT - 3/8"The Milwaukee Red Helix 3/8" cobalt drill bit delivers up to 15X longer life than standard black oxide bits. Built with cobalt alloy for extreme durability, the Variable Helix flute design (35-degree to 15-degree angle) provides rapid chip removal while limiting heat buildup. Engineered for drilling through stainless steel, cast iron, thick metal, wood, and PVC.
- Cobalt alloy construction for up to 15X life vs black oxide
- 135-degree split point for precision starts without walking
- Variable Helix flute geometry for rapid material extraction
- Quad Edge tip with four cutting edges reduces heat buildup
- Enhanced tapered web strengthens the bit core
- 3-Flat Secure-Grip shank prevents slipping in the chuck
- Jobber length for standard drilling applications
- Best for general fabrication, through-bolt clearance holes, and machine screw clearance
- Drills stainless steel, cast iron, thick metal, wood, and PVC
Tip: Use cutting oil and moderate RPM (350-1500 depending on material) when drilling stainless or hardened steel - cobalt bits stay sharp longer when run cool.