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Best 5mm Drill Bit For Metal

Tom Woodward

Senior reporter

★★★★★5.0

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Today

6 min read

Looking for the best 5mm drill bit for metal in March 2026? We reviewed 7 popular options from brands like 5mm, M, HLOFIZI, PATIKIL, METALLIXITY, uxcell and compared them on the things that matter most: build quality, comfort, ease of use, durability, and overall value. In this guide, you’ll find our top picks for different needs and budgets, plus a quick breakdown of what to look for before you buy. If you want a 5mm drill bit for metal that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

★★★★★★4.8

Tool Material:M35 Cobalt Steel

Coating Type:Titanium Coating

Point Angle:135° Point Angle

Flute Design:2 Flutes

Shank Style:Straight Shank

Overall Length:85mm Length

Rapid, heat‑resistant 5 mm cobalt bits cut stainless steel cleanly, with titanium coating for long life and self‑cleaning flutes.

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Best Value

M MIMHOOY 5mm / 0.19" Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal

★★★★★★4.7

Tool Material:M35 Cobalt Steel

Coating Type:No Coating

Point Angle:135° Point Angle

Flute Design:2 Flutes

Shank Style:Straight Shank

Overall Length:85mm Length

Ten 5 mm M35 cobalt bits deliver hard‑metal drilling, split‑point self‑centering and efficient chip evacuation at great value.

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Best Premium

HLOFIZI 5mm Cobalt M35 Drill Bits (5 Pack), Metric Black and Gold Coated Twist Drill Bits for Hard Metal, Stainless Steel and Copper

★★★★★★4.8

Tool Material:M35 Cobalt Steel

Coating Type:Black Gold Coating

Point Angle:135° Point Angle

Flute Design:2 Flutes

Shank Style:Straight Shank

Overall Length:85mm Length

Premium black‑gold coated 5 mm cobalt set resists heat, produces burr‑free holes in stainless, copper and aluminum.

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Detailed Reviews

What to Look For 5mm Drill Bit For Metal

Tool Material

The alloy (e.g., M35 5% cobalt HSS) determines hardness, heat resistance, and ability to cut tough metals like stainless steel without rapid wear.

Coating Type

Surface treatments such as titanium nitride reduce friction, lower cutting temperatures, and extend tool life, especially during high‑speed metal drilling.

Point Angle

A 135° tip provides aggressive cutting and efficient chip breakage, improving hole accuracy and reducing the force needed on hard alloys.

Flute Design

Number of flutes (typically 2) and helix geometry affect chip evacuation and heat dissipation, crucial for preventing binding in metal work.

Shank Style

Straight shanks fit standard drill chucks and collets, offering stable centering and torque transmission for consistent drilling performance.

Overall Length

The total drill length (e.g., 70 mm) influences depth of cut, rigidity, and suitability for shallow versus deep‑hole metal applications.

by 5mm

X Score

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★★★★★

4.8 / 5.0

5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 2pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

BEST OVERALL

These 5mm cobalt bits deliver rapid penetration in stainless steel and cast iron while staying cool. The titanium coating adds surface hardness and resists rust, extending service life well beyond ordinary high speed steel. Two‑flute geometry removes chips efficiently, and the straight shank fits common chucks. Ideal for professional workshops that demand durability and precision without sacrificing accuracy or safety.

Key Specifications

Tool Material

✓M35 Cobalt Steel

Coating Type

✓Titanium Coating

Point Angle

✓135° Point Angle

Flute Design

✓2 Flutes

Shank Style

✓Straight Shank

Overall Length

✓85mm Length

Reasons to Buy

✓Extremely hard metal cutting
✓Long tool life
✓Reduced heat buildup
✓Self cleaning flutes

Reasons Not to Buy

✗Higher cost than standard HSS
✗Limited availability in sets

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by M

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.7 / 5.0

M MIMHOOY 5mm / 0.19" Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal

BEST VALUE

The MIMHOOY 5mm set offers ten cobalt bits that cut stainless steel, cast iron and softer alloys with confidence. Rockwell hardness of 67 provides exceptional wear resistance, while the split‑point tip self centers and reduces walking. Two‑flute design clears debris quickly, and the straight shank fits standard collets. A cost‑effective choice for hobbyists and small shops alike without compromising performance.

Key Specifications

Tool Material

✓M35 Cobalt Steel

Coating Type

✓No Coating

Point Angle

✓135° Point Angle

Flute Design

✓2 Flutes

Shank Style

✓Straight Shank

Overall Length

✓85mm Length

Reasons to Buy

✓High hardness rating
✓Self centering tip
✓Effective chip evacuation
✓Good for multiple metals

Reasons Not to Buy

✗Set may include extra sizes
✗Packaging not robust

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by HLOFIZI

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.8 / 5.0

HLOFIZI 5mm Cobalt M35 Drill Bits (5 Pack), Metric Black and Gold Coated Twist Drill Bits for Hard Metal, Stainless Steel and Copper

BEST PREMIUM

The HLOFIZI five‑piece set combines M35 cobalt steel with a black and gold coating that repels heat and corrosion. A 135° split point starts holes cleanly, while two flutes evacuate chips for smooth operation. Straight shank ensures secure grip in most chucks. Ideal for precision drilling in stainless steel, copper and aluminum where finish quality matters without sacrificing tool durability.

Key Specifications

Tool Material

✓M35 Cobalt Steel

Coating Type

✓Black Gold Coating

Point Angle

✓135° Point Angle

Flute Design

✓2 Flutes

Shank Style

✓Straight Shank

Overall Length

✓85mm Length

Reasons to Buy

✓Premium heat resistance
✓Extended lifespan
✓Burr free holes
✓Versatile metal range

Reasons Not to Buy

✗Higher price point
✗Limited pack size

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PATIKIL 5mm Drill Bit, Jobber Straight Shank M2 High-Speed Steel 135° Titanium Nitride TiN Coated for Stainless Steel Hard Metal - 2 Pack

by PATIKIL

X Score

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★★★★★

4.6 / 5.0

PATIKIL 5mm Drill Bit, Jobber Straight Shank M2 High-Speed Steel 135° Titanium Nitride TiN Coated for Stainless Steel Hard Metal - 2 Pack

BEST RUNNER UP

The PATIKIL 5mm bits are forged from M2 high speed steel and finished with a titanium nitride coating that increases hardness and reduces friction. A 135° split point starts holes accurately, while two flutes provide efficient chip removal. Straight shank fits standard chucks, making them suitable for low to medium carbon steels, alloys and aluminum in hobby and industrial settings.

Key Specifications

Tool Material

✓M2 High Speed Steel

Coating Type

✓Titanium Nitride Coating

Point Angle

✓135° Point Angle

Flute Design

✓2 Flutes

Shank Style

✓Straight Shank

Overall Length

✓85mm Length

Reasons to Buy

✓Robust M2 steel
✓TiN heat resistance
✓Sharp split point
✓Good for many alloys

Reasons Not to Buy

✗Requires coolant on hard steel
✗Shorter lifespan than cobalt

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PATIKIL 5mm Drill Bit, Jobber Straight Shank M35 Cobalt 5% High-Speed Steel 135° Gold Finish for Stainless Steel Hard Metal - 2 Pack

by PATIKIL

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

PATIKIL 5mm Drill Bit, Jobber Straight Shank M35 Cobalt 5% High-Speed Steel 135° Gold Finish for Stainless Steel Hard Metal - 2 Pack

BEST FOR PROFESSIONALS

The PATIKIL 5mm drill bit delivers outstanding performance on hard metals such as stainless steel and titanium. Its M35 steel core with a gold finish resists wear and heat, while the 135° split point starts holes cleanly. The 2‑piece pack is convenient for small workshops, though the price may be higher than basic sets and offers reliable precision drilling today.

Key Specifications

Tool Material

✓M35 high speed steel

Coating Type

✓Gold corrosion resistant

Point Angle

✓135 degree split point

Flute Design

✓Standard straight flute

Shank Style

✓Jobber straight shank

Overall Length

✓85 mm overall

Reasons to Buy

✓Excellent hardness
✓High heat resistance
✓Long life
✓Ideal for stainless

Reasons Not to Buy

✗Higher cost
✗Limited pack size

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METALLIXITY Drill Bit (5mm) 5Pcs, 4341 High-Speed Steel Straight Shank 118° Black and Gold Finish for Copper Aluminum Wood Plastic Medium Hard Metal

by METALLIXITY

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

METALLIXITY Drill Bit (5mm) 5Pcs, 4341 High-Speed Steel Straight Shank 118° Black and Gold Finish for Copper Aluminum Wood Plastic Medium Hard Metal

BEST BUDGET

The METALLIXITY 5mm drill bits provide a practical solution for hobbyists and light maintenance tasks. Made from high speed steel with a black and gold coating, they handle stainless, aluminum, copper and wood at moderate speeds. The 118° tip starts holes quickly, and the six‑piece set keeps costs low, though they may wear faster under heavy use for occasional projects.

Key Specifications

Tool Material

✓High speed steel

Coating Type

✓Black and gold finish

Point Angle

✓118 degree tip

Flute Design

✓Straight flutes

Shank Style

✓Straight shank

Overall Length

✓86 mm overall

Reasons to Buy

✓Affordable pack
✓Good for DIY
✓Versatile materials
✓Easy chip removal

Reasons Not to Buy

✗Limited durability
✗Lower heat resistance

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uxcell 5pcs Straight Shank Twist Drill Bits 5mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 with 5mm Shank for Stainless Steel Alloy Metal Plastic Wood

by uxcell

X Score

X Score is LumberMensHomes's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

uxcell 5pcs Straight Shank Twist Drill Bits 5mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 with 5mm Shank for Stainless Steel Alloy Metal Plastic Wood

BEST FOR BEGINNERS

The uxcell 5mm drill set offers a solid entry point for beginners learning metal drilling. Constructed from high speed steel with a gold titanium nitride coating, the bits resist corrosion and stay sharp. The 135° split point and sharp spiral flutes produce clean holes and efficient chip removal, though the five‑piece kit may be insufficient for larger projects in home.

Key Specifications

Tool Material

✓High speed steel

Coating Type

✓Gold titanium nitride

Point Angle

✓135 degree split

Flute Design

✓Sharp spiral flutes

Shank Style

✓Straight shank

Overall Length

✓85 mm overall

Reasons to Buy

✓Clear markings
✓Smooth cutting
✓Chip evacuation
✓Durable tip

Reasons Not to Buy

✗Limited set size
✗Not for extreme hardness

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Buying Guide

Key Features to Consider

For metal drilling, prioritize material and coating. High‑speed steel (HSS) works for mild steel, while cobalt‑enhanced HSS or carbide tips handle stainless steel and harder alloys. A titanium nitride (TiN) or titanium aluminium nitride (TiAlN) coating reduces heat buildup and extends life. Look for a straight, 3‑flute shank that offers good chip evacuation and a tolerance class of 5 µm or better to ensure precise 5 mm holes.

Budget Recommendations

Entry‑level 5 mm metal bits from reputable manufacturers typically cost $5‑$10 and are suitable for occasional hobby work. Mid‑range options between $10‑$20 often feature cobalt alloy or premium TiN coating, delivering longer life for regular use. Professional‑grade carbide or cobalt bits from brands like Bosch, DEWALT, or Dormer range $20‑$35 and provide consistent performance on tougher metals while still being affordable for small workshops.

Common Pitfalls to Avoid

Never run a 5 mm metal bit at excessive spindle speeds; use the recommended RPM (usually 1,500‑2,500 for steel) and apply proper cutting fluid to prevent overheating. Avoid cheap, uncoated bits that dull quickly, and don’t overtighten the chuck, which can warp the shank and cause wobble. Finally, resist the urge to drill hardened steel with an HSS bit—choose cobalt or carbide instead to prevent breakage.

How We Test Best 5mm Drill Bit For Metal

Our team has spent years researching and evaluating 5mm drill bit for metal across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with 5mm drill bit for metal and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Jewelry makers

They need precise, small-diameter holes for setting stones and creating fine metal components.

Automotive technicians

A 5 mm bit is ideal for drilling pilot holes in brake brackets, engine mounts, and other metal fittings.

DIY hobbyists

When building custom metal projects or repairs, a 5 mm drill provides the accuracy needed for tight tolerances.

Machinist apprentices

Learning to work with metal requires a reliable small bit for practice on prototypes and practice parts.

Frequently Asked Questions

What material should I look for in a 5 mm drill bit for drilling metal?

For metal, the best 5 mm drill bits are made from high‑speed steel (HSS) with a cobalt alloy (often labeled HSS‑Co) or are coated with titanium nitride (TiN). Cobalt bits handle stainless steel and harder alloys, while TiN‑coated HSS bits stay sharp longer on mild steel and aluminum.

Do I need a special drill speed when using a 5 mm bit on metal?

Yes. Use a slower RPM to avoid overheating. For mild steel, aim for 1,200–1,500 RPM; for stainless steel or harder alloys, reduce to 600–800 RPM. Keep the bit lubricated with cutting oil to further lower heat and extend tool life.

How can I tell if a 5 mm drill bit is high quality?

High‑quality bits have a precise 118° or 135° split‑point tip, a uniform shank diameter, and a smooth, consistent flute finish. Look for reputable brands (e.g., Bosch, DeWalt, Irwin, Milwaukee) and certifications such as ISO 9001 or DIN 338 for metric drill bits.

Can I use a 5 mm drill bit for both steel and aluminum?

Absolutely, but choose the right type. A standard HSS bit works well for aluminum and mild steel. For stainless steel or tougher alloys, a cobalt‑enhanced HSS‑Co bit or a TiN‑coated bit is preferable to prevent dulling and breakage.

What maintenance steps should I follow to keep my 5 mm metal drill bit sharp?

After each use, clean the bit of metal shavings and apply a light coat of oil to prevent rust. Periodically inspect the tip for wear; if it becomes rounded, sharpen it with a bench grinder set to a 60°–70° angle (for HSS) or replace the bit. Store bits in a dry case to protect them from moisture.

Meet the Reporter

Tom Woodward

Senior Reporter

Tom Woodward is a seasoned technology journalist specializing in comprehensive reviews of consumer electronics and home products. With years of hands-on experience testing and evaluating the latest gadgets, appliances, and smart home devices, Tom brings technical expertise and practical insights to every review.

Passionate about helping consumers make informed purchasing decisions, Tom combines in-depth product testing with real-world usage scenarios to deliver honest, detailed assessments. Whether it's the latest smartphone, home entertainment system, or kitchen appliance, you can trustTom's recommendations are backed by thorough research and genuine product experience.

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