Century Drill & Tool 24211 — 11/64-inch x 3-1/4-inch black oxide drill bit made from high-speed steel and designed for jobber length applications:

Key Features

• Quick-Cut Point: Self-centering tip for faster penetration with less pressure; prevents walking or wandering on the surface.
• Durability: Offers up to 6–8 times the life compared to standard 118-degree point drill bits. 
• Versatile Use:
  • Common steel (flat bar, angle iron, tubing)
  • Wood
  • Plastic
  • PVC
• Recommended: Use cutting oil when drilling metal for best results.

Specifications

• Size: 11/64 inch (Decimal Equivalent: 0.1719 inch)
• Overall Length: 3-1/4 inches
• Material: Industrial-grade high-speed steel (HSS)
• Finish: Black oxide
• Point Angle: 135 degrees (Quick-Cut Point)
• Shank Type: Straight
• Flute Type: Quick Cut
• Country of Origin: USA
• Standard: Aerospace NAS 907-B

Applications

• Metalworking:
  • Mild steel
  • Sheet metal
  • Flat bar
  • Angle iron
  • Tubing
• Woodworking:
  • Soft and hardwoods
  • Plywood
• Plastics:
  • PVC
  • Acrylic
  • Polycarbonate
• DIY & Construction:
  • Framing
  • Electrical boxes
  • Pilot holes for screws and bolts
• Automotive & Maintenance:
  • Bracket installation
  • Panel drilling
• General Fabrication:
  • Light manufacturing
  • Assembly line work

Why It’s Effective

• The 135° quick-cut point helps reduce walking and improves accuracy, especially on curved or hard surfaces.
• The black oxide coating increases wear resistance and helps retain lubricants.
• High-speed steel (HSS) provides durability and heat resistance for repeated use