Greycore 1/8" x 6" M35 Cobalt Aircraft Extension Drill Bit (2-Pack)

What people love (and don’t love)

What people love

High quality, sharp and durable bits suitable for various materials including wood and mild steel.
Length is ideal for deep drilling tasks and difficult-to-reach spots.
Reusable and sturdy plastic container for storage and protection.
Perform well for pilot holes and pocket holes without splitting wood.
Good value for price with consistent performance over multiple uses.
Fast delivery and as advertised.

What people don’t love

One report of receiving used or damaged item requiring re-sharpening before use.
Some minor concerns about wear on drill chuck end due to slippage.
Not all users have tested performance on metal; mostly positive but limited metal usage feedback.

Reliable and well-made long drill bits ideal for woodworking and light metal work, with occasional quality control issues.

Summary based on customer review evidence.

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Quick facts

Brand: Greycore
Price: USD 7.99
Rating: 4.50 (465 reviews)

When you need extra reach without stepping up to a larger diameter, the Greycore Tools 1/8″ x 6″ Cobalt Aircraft Extension Bit set is a practical, workshop-ready choice. This 2-pack is made from M35 cobalt high speed steel (5% cobalt) with an industrial-strength titanium coating, helping the bits stand up to heat and abrasion during demanding drilling tasks.

You can view the current price and full details on Amazon here.

Each bit features a 135° split point tip designed to reduce slipping and support faster, smoother drilling starts—especially helpful when working on harder materials or when accuracy matters in tight spaces.

2-pack of 1/8″ x 6″ long cobalt drill bits for extended reach
M35 cobalt high speed steel (5% cobalt) for durability in demanding drilling
Titanium finish for added resistance to abrasion and high heat
135° split point tip helps prevent walking and supports smoother starts
Works on hard metals, stainless steel, cast iron, steel, titanium alloy, hard plastics, and wood

With a straight shank and spiral flute design, these long-length bits fit a wide range of common drilling setups and are well suited for repair, construction, and woodworking applications.