1/4 Inch By 8 Inch Long Drill Bit With Black Oxide Coating And Cobalt Alloy, Aircraft Extension Bit For Steel Hard Metals Cast Iron Wood And Plastic, Industrial Grade Heavy Duty Drill Bit For Precise Drilling

1/4 in x 8 in cobalt aircraft extension drill bit
✔️ 1 pc pack; 1/4 in dia, 8 in length, 135° split

These aircraft extension drill bits are built for reaching tight spots and drilling through tough metals. They excel in steel, stainless steel, cast iron, aluminum, copper, wood, and plastic, in professional shops and DIY projects.

✅ Cutting diameter 1/4 in; overall length 8 in
✅ Black oxide coating boosts wear resistance and lubricity
✅ 135° split point for fast startup and reduced walking
✅ Right-hand spiral aids chip removal and reduces clogging

💡 What is a drill bit with cobalt alloy used for in metalworking? Handy for drilling tough metals and precise holes.
- Handy for steel, cast iron, and other hard alloys
- Cobalt alloy enhances hardness and heat resistance
- Black oxide coating improves lubrication and edge life
- Great for reaching tight spots and long reach drilling