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1/4 Inch x 8 Inch Drill Bit – Long Drill Bit, Industrial Black Oxide Coating – Cobalt Aircraft Extension Drill Bits for Steel, Hard Metal, Cast Iron, Wood, Plastic 1/4 x 8 Inch

What people love (and don’t love)

What people love

  • Good sharpness and quality for drilling tasks
  • Effective for long and deep drilling needs
  • Works well on wood and other materials
  • Affordable price for the quality received
  • Suitable for specialized tasks like musical instrument work

What people don’t love

  • Some users found the bit dull very quickly
  • Quality may feel cheap for heavy-duty metal drilling
  • Not ideal for very hard materials according to some reviews

Reliable long drill bit with good performance for wood and light metals, but may wear out quickly under heavy use.

Summary based on customer review evidence.

Quick facts

  • Brand: ‎YOKOCUT
  • Price: USD 5.68
  • Rating: 3.90 (8 reviews)

If you need extra reach without stepping up to specialty tooling, the YOKOCUT 1/4″ x 8″ long drill bit is designed for accessing hard-to-reach drilling locations while keeping the size you’re used to. It features a precise 1/4-inch cutting diameter and an 8-inch overall length for targeted drilling tasks where standard-length bits can’t fit.

This aircraft extension-style bit is made from cobalt steel and finished with a black oxide coating to improve lubricity and help hold coolant near the cutting edge. A 135° split point construction is intended to promote efficient starts, while the right-hand, spiral-fluted design helps lift chips up and away to reduce clogging during drilling.

It’s a versatile pick for jobs involving steel, hard metal, cast iron, aluminum, stainless steel, as well as wood and plastic—ideal for DIY repairs, shop work, and metalworking tasks that demand reach.

  • 1/4″ cutting diameter with 8″ overall length for long-reach drilling
  • Cobalt steel construction with black oxide finish for improved lubricity
  • 135° split point design for efficient starts
  • Spiral, right-hand flutes to help clear chips during drilling
  • Suitable for steel, hard metal, cast iron, aluminum, stainless steel, wood, and plastic