✨ 1/8" x 6" Cobalt Aircraft Extension Drill Bit Set – 5 Pcs

High-Performance Long-Reach Drill Bits for Deep Hole Drilling in Stainless Steel & Hard Metals

Engineered for precision and durability, this 5-piece set of 1/8" x 6" cobalt aircraft extension drill bits is built to tackle deep hole drilling applications in the most demanding materials. Made from premium cobalt steel with a 135° split point, these bits offer exceptional heat resistance, reduced walking, and superior penetration — ideal for drilling in stainless steel, cast iron, titanium alloys, and other hard metals.

Whether you're in aviation, automotive, fabrication, or heavy-duty industrial work, these long-reach bits deliver the performance professionals rely on.

✅ Key Features:

• Extra-Long 6-Inch Length
  Aircraft-style extension design provides access to hard-to-reach and deep areas, perfect for long hole drilling without compromising precision.

• Industrial-Grade M35 Cobalt Steel
  Contains 5% cobalt for enhanced heat resistance and wear durability — ideal for high-speed drilling in stainless steel and other tough alloys.

• 135° Split Point Tip
  Self-centering design starts on contact, minimizes walking, and requires less thrust — providing cleaner entry and faster cutting.

• Precision Ground Flutes
  Optimized chip removal and reduced friction for smoother, straighter drilling even at extended depths.

• Multi-Material Versatility
  Perfect for stainless steel, hardened steel, cast iron, aluminum, brass, and other ferrous and non-ferrous metals.

• Professional Finish
  Gold finish enhances heat resistance and adds corrosion protection for extended tool life.

🌟 Advantages:

• Delivers accurate, burr-free deep holes in hard-to-drill metals

• Resists heat buildup for longer cutting life under extreme conditions

• Reduces bit walking, skidding, and surface damage

• Ideal for precision work in aerospace, automotive, metal fabrication, and maintenance applications

📦 Specifications:

• Bit Size: 1/8 inch (3.175mm)

• Flute Length: 1-5/8 inch (41.28mm)

• Overall Length: 6 inches (152.4mm)

• Material: M35 Cobalt Steel

• Point Angle: 135° Split Point

• Quantity: 5 Pieces per set