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Best 5mm Drill Bit

Tom Woodward

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best 5mm drill bit in March 2026? We reviewed 8 popular options from brands like 5mm, M, Milescraft, Cobalt, HLOFIZI, Metric, METALLIXITY, TP-5MMJ-2P 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 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

Material / Cobalt Grade:M35 5% Cobalt Steel

Coating Type:Titanium HSS Coating

Overall Length:90mm Overall Length

Shank Design:Straight Shank

Point Angle:135° Split Point

Flute Geometry:2-Flute Chatter Free

Titanium‑coated 5mm M35 cobalt drill delivers rapid heat resistance, self‑centering precision, and long‑lasting wear for hard metals.

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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

Material / Cobalt Grade:M35 5% Cobalt Steel

Coating Type:No Coating

Overall Length:80mm Overall Length

Shank Design:Straight Shank

Point Angle:135° Split Point

Flute Geometry:2-Flute Self Centering

MIMHOOY 5mm M35 cobalt set offers high wear resistance, self‑centering tip, and fast chip evacuation for demanding metal work.

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Best Premium

Milescraft 2312 5mm ShelfPinBit - For drilling shelf pin holes

★★★★★★4.8

Material / Cobalt Grade:High Speed Steel

Coating Type:No Coating

Overall Length:55mm Overall Length

Shank Design:Bushing Shank

Point Angle:118° Brad Point

Flute Geometry:Single Spiral Cut

Milescraft 5mm ShelfPinBit provides spring‑loaded brad point and built‑in guide bushing for precise, repeatable shelf‑pin holes.

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Detailed Reviews

What to Look For 5mm Drill Bit

Material / Cobalt Grade

Determines hardness and wear resistance; M35 5% cobalt steel reaches Rockwell 65, offering faster cuts and up to ten‑times longer life than standard HSS.

Coating Type

Adds surface hardness and reduces friction; titanium or TiN coating extends tool life, lowers heat buildup, and improves performance on stainless steel and cast iron.

Overall Length

Defines maximum drilling depth and compatibility with machine spindles; longer bits reach deeper holes while maintaining rigidity, crucial for precise 5 mm holes.

Shank Design

Ensures secure grip in the chuck; straight shank fits standard chucks, while hex or SDS options provide higher torque transmission and reduced run‑out.

Point Angle

Affects start‑up accuracy and chip removal; a 135° split‑point initiates drilling without walking and cuts efficiently in medium‑hard metals.

Flute Geometry

Controls chip evacuation and heat dissipation; 2‑flute design clears debris quickly, minimizing friction and delivering smoother, cooler drilling in hard alloys.

by 5mm

X Score

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

★★★★★

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 exceptional performance on stainless steel and cast iron. The titanium coating reduces friction while the 135° split point starts holes without wandering. Two flutes clear chips efficiently, keeping temperatures low. The straight shank fits standard chucks, and the hardened alloy resists wear far longer than ordinary HSS. Ideal for precision metalwork in demanding industrial settings.

Key Specifications

Material / Cobalt Grade

✓M35 5% Cobalt Steel

Coating Type

✓Titanium HSS Coating

Overall Length

✓90mm Overall Length

Shank Design

✓Straight Shank

Point Angle

✓135° Split Point

Flute Geometry

✓2-Flute Chatter Free

Reasons to Buy

✓Rapid heat resistance
✓Extended tool life
✓Sharp self centering tip
✓Easy chip evacuation

Reasons Not to Buy

✗Limited to metal only
✗No metric length options

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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 cobalt set excels when drilling stainless steel, cast iron, and even wood. Its 135° split point penetrates with minimal pressure, while the self centering design prevents walking. Two flutes evacuate debris quickly, keeping the cut cool. Although lacking a coating, the M35 alloy provides superior hardness and longevity for demanding projects in professional workshop environments daily use.

Key Specifications

Material / Cobalt Grade

✓M35 5% Cobalt Steel

Coating Type

✓No Coating

Overall Length

✓80mm Overall Length

Shank Design

✓Straight Shank

Point Angle

✓135° Split Point

Flute Geometry

✓2-Flute Self Centering

Reasons to Buy

✓High wear resistance
✓Fast chip evacuation
✓Self centering tip
✓Effective on hardened metals

Reasons Not to Buy

✗No protective coating
✗Shorter length may limit depth

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by Milescraft

X Score

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

★★★★★

4.8 / 5.0

Milescraft 2312 5mm ShelfPinBit - For drilling shelf pin holes

BEST PREMIUM

The Milescraft 5mm ShelfPinBit provides accurate holes for shelf pin hardware. Its spring‑loaded brad point starts cleanly, while the built‑in 3/8" guide bushing guarantees repeatable positioning. The single spiral cut removes wood shavings efficiently, preventing tear‑out. Designed for woodworking, it lacks the durability needed for metal drilling, but excels in cabinet and DIY projects and improves overall assembly precision today.

Key Specifications

Material / Cobalt Grade

✓High Speed Steel

Coating Type

✓No Coating

Overall Length

✓55mm Overall Length

Shank Design

✓Bushing Shank

Point Angle

✓118° Brad Point

Flute Geometry

✓Single Spiral Cut

Reasons to Buy

✓Precise shelf pin placement
✓Spring loaded stability
✓Guide bushing ensures repeatability
✓Compact 5mm size

Reasons Not to Buy

✗Not suitable for metal
✗Limited to wood applications

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Cobalt Metric Drill bits Set 1.5mm-6.5mm/13PCS High-Speed Steel Drill bit for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic

by Cobalt

X Score

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

★★★★★

4.8 / 5.0

Cobalt Metric Drill bits Set 1.5mm-6.5mm/13PCS High-Speed Steel Drill bit for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic

BEST RUNNER UP

This 13‑piece cobalt set covers diameters from 1.5mm to 6.5mm, making it ideal for diverse projects. The M35 alloy with titanium coating resists heat and wear, while the 135° split points start holes accurately in stainless steel and cast iron. Double‑edge flutes clear chips efficiently. Avoid using on glass or ceramic, and expect some overlap in size selection now today.

Key Specifications

Material / Cobalt Grade

✓M35 5% Cobalt Steel

Coating Type

✓Titanium Coating

Overall Length

✓75mm Overall Length

Shank Design

✓Round Shank

Point Angle

✓135° Split Point

Flute Geometry

✓2-Flute Double Edge

Reasons to Buy

✓Versatile size range
✓High heat resistance
✓Sharp double edge
✓Suitable for hard metals

Reasons Not to Buy

✗Not for glass or ceramic
✗Set may include redundant sizes

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

by HLOFIZI

X Score

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

★★★★★

4.3 / 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 BUDGET

The HLOFIZI 5mm M35 cobalt set delivers reliable performance on hardened alloys, stainless steel and copper. Its black and gold coating reduces heat buildup while resisting rust, extending tool life. Precision ground geometry produces clean, burr‑free holes with minimal effort. Ideal for workshop and hobbyist use, the five‑piece pack offers good value and consistent results throughout every drilling session today.

Key Specifications

Material / Cobalt Grade

✓M35 cobalt steel

Coating Type

✓Black gold coating

Overall Length

✓86 mm overall

Shank Design

✓Straight shank

Point Angle

✓118° point angle

Flute Geometry

✓Standard flute design

Reasons to Buy

✓Long tool life
✓Heat resistant coating
✓Precise hole accuracy
✓Value pack of five

Reasons Not to Buy

✗Limited to 5mm size
✗Slightly higher price

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Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.

by Metric

X Score

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

★★★★★

4.4 / 5.0

Metric Cobalt Drill Bits Set 1.5-6.5mm 13PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.

BEST FOR PROFESSIONALS

The 13‑piece metric cobalt set covers diameters from 1.5 to 6.5 mm, providing flexibility for diverse projects. Constructed from 5 % cobalt M35 HSS‑CO, each bit resists wear and maintains sharpness in stainless steel, cast iron, copper and aluminum. The consistent geometry ensures accurate entry and clean exits, making it a solid choice for demanding applications in professional workshop environments today everywhere.

Key Specifications

Material / Cobalt Grade

✓5% cobalt M35

Coating Type

✓No coating

Overall Length

✓80 mm length

Shank Design

✓Straight shank

Point Angle

✓118° split point

Flute Geometry

✓Standard flute

Reasons to Buy

✓Wide size range
✓High wear resistance
✓Suitable for multiple metals
✓Consistent drilling accuracy

Reasons Not to Buy

✗No protective coating
✗Package size may be bulky

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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 FOR BEGINNERS

METALLIXITY 5mm HSS bits are designed for everyday maintenance and light‑duty drilling in stainless steel, aluminum, copper, wood and plastic. The 118° point and 53 mm flute length provide balanced cutting action, while the black‑gold finish offers modest heat resistance. The five‑piece set delivers reliable performance for DIY tasks without excessive cost making them suitable for home workshops and repairs today.

Key Specifications

Material / Cobalt Grade

✓4341 high speed steel

Coating Type

✓Black gold finish

Overall Length

✓86 mm overall

Shank Design

✓Straight shank

Point Angle

✓118° point

Flute Geometry

✓Standard flute

Reasons to Buy

✓Versatile material compatibility
✓Moderate heat resistance
✓Affordable five‑piece pack
✓Easy to replace

Reasons Not to Buy

✗Not ideal for hard metals
✗Limited lifespan under heavy use

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TP-5MMJ-2P - 5mm Ultra BOR Super Premium Jobber Length Drill Bit - True Position Tools

by TP-5MMJ-2P

X Score

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

★★★★★

4.5 / 5.0

TP-5MMJ-2P - 5mm Ultra BOR Super Premium Jobber Length Drill Bit - True Position Tools

BEST PREMIUM PICK

True Position Tools Ultra BOR 5mm bit excels in solid wood applications, delivering precise, clean holes thanks to its nitro‑carburized steel and true‑position geometry. The job‑ber length provides adequate reach, while the 118° point ensures centered entry. This premium bit maintains sharpness longer than standard HSS, making it a reliable choice for fine woodworking projects in hobby and professional settings.

Key Specifications

Material / Cobalt Grade

✓Nitro‑carburized steel

Coating Type

✓No coating

Overall Length

✓90 mm length

Shank Design

✓Straight shank

Point Angle

✓118° point

Flute Geometry

✓Jobber flute design

Reasons to Buy

✓Excellent wood finish
✓Long lasting sharpness
✓Accurate true‑position geometry
✓Adequate reach for deep holes

Reasons Not to Buy

✗Not suited for metal
✗Higher price point

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Buying Guide

Key Features to Consider

When selecting a 5 mm drill bit, prioritize material and coating. High‑speed steel (HSS) is a baseline choice, but cobalt‑alloy or carbide tips extend life for metal work, while titanium or black oxide coatings reduce friction on wood and plastics. Verify the shank type—hex, round, or SDS—matches your chuck, and check the length to ensure adequate reach without sacrificing rigidity.

Budget Recommendations

For hobbyists, a quality HSS bit with a titanium coating can be found for $5‑$10 per set of 5, offering reliable performance on wood and light metal. Professional users needing durability should consider cobalt‑alloy bits priced $12‑$20 each, which handle stainless steel and hardened alloys. Carbide‑tipped specialty bits run $25‑$35 but are justified for high‑volume CNC or aerospace applications.

Common Pitfalls to Avoid

Do not overspeed the bit; excessive RPM generates heat that dulls the cutting edge and can cause workpiece burn‑through. Avoid using a bit with a mismatched shank—loose fit leads to wobble and inaccurate holes. Finally, resist the temptation to reuse a worn tip on hard materials; replace it promptly to preserve surface finish and prevent breakage.

How We Test Best 5mm Drill Bit

Our team has spent years researching and evaluating 5mm drill bit 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 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

DIY home renovators

A 5 mm bit is perfect for drilling pilot holes in drywall, wood, and plastic when installing fixtures or mounting shelves.

Electronics hobbyists

The small diameter allows precise holes for mounting circuit boards, LEDs, and wiring in prototype enclosures.

Jewelry makers & metal artisans

A 5 mm drill bit creates clean, accurate openings in precious metals for setting stones or assembling components.

Model‑building enthusiasts

It provides the fine control needed to drill tiny, exact holes in plastic or resin kits without cracking the material.

Frequently Asked Questions

What material should I look for in a high‑quality 5 mm drill bit?

The best 5 mm bits are made from high‑speed steel (HSS) with a titanium or cobalt coating for increased hardness and heat resistance. For tougher materials like stainless steel or titanium alloys, a cobalt‑based (M35 or M42) or carbide tip is ideal.

Can a 5 mm drill bit be used for both wood and metal?

Yes, but you should choose the appropriate type: a standard HSS bit works well for wood and soft metals, while a titanium‑coated or cobalt bit is recommended for harder metals. Using the correct speed and lubrication will prevent dulling and overheating.

What RPM range is optimal for drilling a 5 mm hole in steel?

For medium‑carbon steel, keep the spindle speed between 1,500 – 2,000 RPM. If you’re drilling stainless steel or titanium, reduce the speed to 800 – 1,200 RPM and use cutting fluid to extend bit life.

How can I tell if my 5 mm drill bit is still sharp?

Inspect the tip under good lighting: a sharp bit will have a clean, symmetrical cutting edge with no rounding or burrs. You can also run the bit lightly over a piece of scrap material; a sharp bit will cut cleanly without grabbing or producing excessive shavings.

Do I need a special holder or collet for a 5 mm drill bit?

A standard 3/8‑inch (9.5 mm) or 1/2‑inch (12.7 mm) collet/chuck will securely hold a 5 mm shank. For precision work, a keyless chuck with a tight grip or a mini‑collet designed for small‑diameter bits reduces wobble and improves accuracy.

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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