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Home / Home Furniture / Tungsten Carbide Drill Bits: High-Hardness Alloy Twist Drills, Extended Length Set for Drilling Stainless Steel and Hard Iron

Attributes

Brand -
Category Root / Home Furniture
Origin -
Material Tungsten Carbide Alloy
Shank Type Straight Shank
Point Angle 135 Degrees
Coating Black Oxide Finish
Set Count 5 Pieces
Compatible Materials Stainless Steel, Hard Iron, Cast Iron
Flute Type Spiral Twist
Length Category Extended Length Series
Coolant Requirement Recommended for Extended Use
Storage Case Included Plastic Index Box

6 reviews

A

Anonymous

Mar 15, 2026

Rating: 5/5

Excellent for tough metals

These drill bits cut through stainless steel like butter. The extended length was exactly what I needed for my deep frame projects.

A

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for deep holes

The extended length feature is not just marketing; it genuinely helps reach difficult spots in thick metal assemblies. Very satisfied.

A

Anonymous

Mar 08, 2026

Rating: 4/5

Solid performance

Good set for the price. They handled the hardened bolts on my old table repair without dulling. One bit chipped slightly due to user error, but overall great.

A

Anonymous

Mar 08, 2026

Rating: 5/5

Precise and long-lasting

The 135-degree point angle prevents walking, which is crucial for precision work. Highly recommend for any serious home workshop.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Best investment for metalwork

I have gone through so many standard bits trying to drill into my steel furniture frames. These tungsten carbide ones are a game changer.

A

Anonymous

Mar 03, 2026

Rating: 4/5

Great quality, needs slow speed

Very sharp and durable. Just remember to use a slower RPM setting to prevent overheating on hard iron. Works perfectly otherwise.

5 FAQ

Q: What is the maximum thickness of metal these can drill through?

A: Thanks to the extended length design, these bits can effectively drill through materials up to several inches thick, depending on the specific bit size in the set.

Q: Does the set come with a storage case?

A: Yes, the set includes a durable plastic index box to keep each bit organized and protected when not in use.

Q: Do I need to use cooling oil when drilling stainless steel?

A: While not strictly mandatory for short bursts, we highly recommend using cutting fluid or oil to extend the life of the bit and ensure a cleaner cut on stainless steel.

Q: Can these bits be used with a standard handheld power drill?

A: Yes, as long as your drill has a chuck that accommodates the shank size and can operate at variable speeds, these bits are fully compatible.

Q: Are these suitable for drilling into wood or masonry?

A: These are specifically engineered for hard metals. While they might cut wood, it is inefficient, and they are not designed for masonry or concrete.

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