Ratings represent our editorial opinion, not Amazon's. LumberMensHomes is reader-supported and may earn an affiliate commission. Details

9 Drill Bit Equivalent

Tom Woodward

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best 9 drill bit equivalent in March 2026? We reviewed 8 popular options from brands like 9mm, HLOFIZI, Hymnorq, CoCud, uxcell, MACXCOIP 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 9 drill bit equivalent that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

9mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

★★★★★★4.8

Diameter (Size):9mm Diameter

Material / Cobalt Content:M35 5% Cobalt

Coating Type:Titanium Coating

Point Angle:118° Point Angle

Flute Design & Count:2 Flutes Design

Maximum RPM / Speed Rating:Up to 6000 RPM

Ultra‑hard M35 cobalt bit endures extreme heat, stays razor‑sharp, and outlasts standard HSS on stainless steel.

Check Price

Best Value

HLOFIZI 9mm M2 Drill Bits (2 Pack), Metric High Speed Steel Drill Bits for Metal, Stainless Steel and Hard Wood

★★★★★★4.6

Diameter (Size):9mm Diameter

Material / Cobalt Content:M2 High Speed Steel

Coating Type:Black Flute Coating

Point Angle:118° Point Angle

Flute Design & Count:2 Flutes

Maximum RPM / Speed Rating:Up to 5500 RPM

Triple‑life M2 drills resist heat and rust, delivering clean, burr‑free holes in metal and hard wood.

Check Price

Best Premium

Hymnorq 8-Piece Metric Twist Drill Bit Set (3mm-10mm) with Indexed Storage Case, Budget-Friendly HSS 4241 Roll-Forged Bits with Anti-Rust Gold Finish for Wood, Plastic & Soft Metals

★★★★★★4.7

Diameter (Size):3‑10mm Size Range

Material / Cobalt Content:HSS 4241 Steel

Coating Type:Gold Anti‑Rust Finish

Point Angle:118° Point Angle

Flute Design & Count:2 Flutes

Maximum RPM / Speed Rating:Up to 4000 RPM

Budget‑friendly 8‑piece roll‑forged set with gold anti‑rust finish, perfect for wood, plastics, and soft metals.

Check Price

Detailed Reviews

What to Look For 9 Drill Bit Equivalent

Diameter (Size)

Determines the hole size you can make; must match the required clearance or fit for the fastener or component being installed.

Material / Cobalt Content

Cobalt‑enhanced M35 steel offers higher hardness and heat resistance, extending tool life and enabling faster cutting of hard metals like stainless steel.

Coating Type

Titanium (TiN) coating reduces friction and wear, improves chip evacuation, and increases lifespan compared with plain HSS, especially in high‑speed drilling.

Point Angle

A 135° tip provides a sharper entry for hard alloys, reducing thrust force and burr formation while improving hole accuracy.

Flute Design & Count

Two‑flute, staggered cutting teeth promote efficient chip removal and lower heat buildup, essential for clean, chatter‑free holes in metal.

Maximum RPM / Speed Rating

Specifies the highest safe spindle speed; higher RPM enables quicker drilling but must stay within the material’s heat‑tolerance limits.

by 9mm

X Score

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

★★★★★

4.8 / 5.0

9mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO

BEST OVERALL

The 9mm M35 cobalt drill bit delivers outstanding performance on stainless steel and cast iron. Its titanium coating preserves sharpness while the two‑flute geometry removes chips efficiently. The hardened alloy reaches Rockwell 65, extending life far beyond standard HSS bits. Ideal for professional metalworking, it maintains stability at high speeds. A premium choice for demanding applications and reliable results everytime.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓M35 5% Cobalt

Coating Type

✓Titanium Coating

Point Angle

✓118° Point Angle

Flute Design & Count

✓2 Flutes Design

Maximum RPM / Speed Rating

✓Up to 6000 RPM

Reasons to Buy

✓Excellent heat resistance
✓Long tool life
✓Sharp cutting edge
✓Easy chip evacuation

Reasons Not to Buy

✗Higher cost than basic HSS
✗Limited availability

Check Price

by HLOFIZI

X Score

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

★★★★★

4.6 / 5.0

HLOFIZI 9mm M2 Drill Bits (2 Pack), Metric High Speed Steel Drill Bits for Metal, Stainless Steel and Hard Wood

BEST VALUE

The HLOFIZI 9mm M2 drill bits offer strong durability for metal, stainless steel, aluminum and hard wood. Their black flute coating resists heat and rust, extending tool life up to three times longer than ordinary HSS. Precise ground geometry produces fast, clean, burr‑free holes. Packaged in a convenient two‑piece set, they perform reliably at moderate speeds for consistent results everytime.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓M2 High Speed Steel

Coating Type

✓Black Flute Coating

Point Angle

✓118° Point Angle

Flute Design & Count

✓2 Flutes

Maximum RPM / Speed Rating

✓Up to 5500 RPM

Reasons to Buy

✓Triple life expectancy
✓High heat resistance
✓Rust protection coating
✓Clean burr‑free holes

Reasons Not to Buy

✗Limited to two pieces
✗Not suited for very hard steel

Check Price

by Hymnorq

X Score

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

★★★★★

4.7 / 5.0

Hymnorq 8-Piece Metric Twist Drill Bit Set (3mm-10mm) with Indexed Storage Case, Budget-Friendly HSS 4241 Roll-Forged Bits with Anti-Rust Gold Finish for Wood, Plastic & Soft Metals

BEST PREMIUM

The Hymnorq 8‑piece metric set covers common diameters from 3mm to 10mm, making it a convenient choice for hobbyists and light‑duty work. Roll‑forged HSS 4241 provides flexibility and resistance to breakage, while the gold anti‑rust finish protects against corrosion. Designed for wood, plastic and thin metal, the bits fit neatly into the bright yellow case for easy transport and storage.

Key Specifications

Diameter (Size)

✓3‑10mm Size Range

Material / Cobalt Content

✓HSS 4241 Steel

Coating Type

✓Gold Anti‑Rust Finish

Point Angle

✓118° Point Angle

Flute Design & Count

✓2 Flutes

Maximum RPM / Speed Rating

✓Up to 4000 RPM

Reasons to Buy

✓Budget friendly set
✓Roll forged toughness
✓Indexed yellow case
✓Ideal for wood and plastics

Reasons Not to Buy

✗Not for hard steel
✗Limited to soft materials

Check Price

CoCud Twist Drill Bits, 9mm Cutting Edge, Titanium & Nitride Coated High Speed Steel 4341 Round Shank - (Applications: for Stainless Steel Drilling Machine), 1-Piece

by CoCud

X Score

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

★★★★★

4.5 / 5.0

CoCud Twist Drill Bits, 9mm Cutting Edge, Titanium & Nitride Coated High Speed Steel 4341 Round Shank - (Applications: for Stainless Steel Drilling Machine), 1-Piece

BEST RUNNER UP

The CoCud 9mm twist drill combines HSS 4341 core with titanium and nitride dual coatings, delivering smooth entry and excellent wear resistance. Its 118° point angle and two‑flute design evacuate chips efficiently, suitable for stainless steel, aluminum, brass and hard plastics. The round shank fits standard drill presses, offering reliable performance for precision machining tasks and consistent results every time.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓HSS 4341 Steel

Coating Type

✓Titanium Nitride Coating

Point Angle

✓118° Point Angle

Flute Design & Count

✓2 Flutes

Maximum RPM / Speed Rating

✓Up to 4500 RPM

Reasons to Buy

✓Dual coating durability
✓Round shank compatibility
✓Versatile material range
✓Long cutting length

Reasons Not to Buy

✗Not for masonry
✗Higher price point

Check Price

uxcell 2pcs Straight Shank Twist Drill Bits 9mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 with 9mm 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.

★★★★★

4.3 / 5.0

uxcell 2pcs Straight Shank Twist Drill Bits 9mm Gold Titanium & Black Nitride Coated High Speed Steel (HSS) 4341 with 9mm Shank for Stainless Steel Alloy Metal Plastic Wood

The uxcell 9mm straight shank drill bits deliver reliable performance on steel, aluminum and wood. Gold titanium and black nitride coating reduces friction and extends life, while the 135° split point starts holes accurately. Spiral flutes clear chips efficiently, and the HSS core resists wear. Ideal for hobbyists needing a compact, dual‑coated set. They fit standard chucks easily, delivering consistent results.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓High Speed Steel

Coating Type

✓Gold Titanium & Black Nitride

Point Angle

✓135° Point Angle

Flute Design & Count

✓Spiral Flutes

Maximum RPM / Speed Rating

✓3000 RPM Max

Reasons to Buy

✓Sharp cutting edge
✓Durable coating
✓Good chip evacuation
✓Straight shank fits most chucks

Reasons Not to Buy

✗No length options
✗Coating may wear

Check Price

uxcell 2pcs Jobber Drill Bits 9mm (0.354") Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal

by uxcell

X Score

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

★★★★★

4.3 / 5.0

uxcell 2pcs Jobber Drill Bits 9mm (0.354") Black Nitride & Gold Titanium Coated M2 High Speed Steel (HSS) Twist Drill Bits for Stainless Steel Aluminum Alloy Metal

uxcell 9mm jobber bits combine M2 HSS hardness with a black nitride and gold titanium dual coating for superior heat resistance and longevity. The 135° split point initiates clean starts, while large spiral grooves evacuate chips quickly. Precision cutting reduces burrs, making them suitable for CNC drilling and hand tools alike. They command a premium price but reward performance overall.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓M2 High Speed Steel

Coating Type

✓Black Nitride & Gold Titanium

Point Angle

✓135° Point Angle

Flute Design & Count

✓Large Spiral Grooves

Maximum RPM / Speed Rating

✓3000 RPM Max

Reasons to Buy

✓Excellent heat resistance
✓Dual coating durability
✓Precise hole geometry
✓Works in CNC machines

Reasons Not to Buy

✗Higher price than basic bits
✗Limited size range

Check Price

HLOFIZI 9mm M42 8% Cobalt Drill Bits (1 Pack), Metric Titanium Twist Drill Bits for Hard Metal, Stainless Steel and Cast Iron

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 9mm M42 8% Cobalt Drill Bits (1 Pack), Metric Titanium Twist Drill Bits for Hard Metal, Stainless Steel and Cast Iron

HLOFIZI 9mm M42 cobalt drill bit excels in drilling stainless steel, cast iron and hardened alloys. The 8% cobalt core offers hardness while the titanium coating adds heat resistance and rust protection. A 135° split point starts holes accurately, and precision ground flutes deliver fast, burr‑free drilling. Its single‑size design limits versatility, and the premium price reflects its specialist performance.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓M42 8% Cobalt

Coating Type

✓Titanium Coating

Point Angle

✓135° Point Angle

Flute Design & Count

✓Precision Ground Flutes

Maximum RPM / Speed Rating

✓2500 RPM Max

Reasons to Buy

✓Extreme durability
✓Excellent for hard metals
✓Clean burr‑free holes
✓Long tool life

Reasons Not to Buy

✗Higher cost
✗Best used at lower speeds

Check Price

MACXCOIP Metric 4Pcs M35 Cobalt Drill Bit Set, 9mm HSS Cobalt Jobber Drill Bits, for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics

by MACXCOIP

X Score

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

★★★★★

4.3 / 5.0

MACXCOIP Metric 4Pcs M35 Cobalt Drill Bit Set, 9mm HSS Cobalt Jobber Drill Bits, for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics

MACXCOIP 9mm M35 cobalt bits provide a strong, sharp cutting edge suitable for stainless steel, cast iron, copper, aluminum and plastics. The 135° self‑centering tip prevents walk‑off, while standard spiral flutes remove chips efficiently. Built from M35 cobalt, they handle both soft and harder alloys. They are not recommended for quenched bolts and come only in one size, limiting flexibility.

Key Specifications

Diameter (Size)

✓9mm Diameter

Material / Cobalt Content

✓M35 Cobalt

Coating Type

✓No Coating

Point Angle

✓135° Point Angle

Flute Design & Count

✓Standard Spiral Flutes

Maximum RPM / Speed Rating

✓3000 RPM Max

Reasons to Buy

✓Robust for soft and hard metals
✓Self‑centering tip
✓Good chip removal
✓Versatile across materials

Reasons Not to Buy

✗Not for quenched bolts
✗Limited to single size

Check Price

Buying Guide

Key Features to Consider

When selecting a 9 mm drill bit equivalent, focus on material composition, geometry, and coating. High‑speed steel (HSS) offers versatility for wood, metal, and plastic, while carbide or cobalt alloys excel in hardened steel and masonry. The flute design—standard straight versus spiral—affects chip evacuation and torque. A TiN or TiAlN coating reduces heat buildup and extends lifespan, especially under high‑speed operation.

Budget Recommendations

Entry‑level kits (5‑10 mm bits) typically range from $10‑$20 and are suitable for occasional DIY tasks. Mid‑range sets priced $25‑$45 provide premium coatings and tighter tolerances, ideal for hobbyists and light professional use. For heavy‑duty applications, invest in specialist bits or a 9 mm carbide set costing $60‑$100; the higher upfront cost pays off through durability and reduced bit breakage.

Common Pitfalls to Avoid

Do not assume a larger shank guarantees compatibility; mismatched chuck sizes can cause wobble and reduced accuracy. Avoid using uncoated HSS bits at high speeds on hard metals, as they overheat and dull quickly. Lastly, neglecting proper lubrication when drilling metal leads to premature wear—always apply cutting oil or coolant to preserve edge integrity.

How We Test 9 Drill Bit Equivalent

Our team has spent years researching and evaluating 9 drill bit equivalent 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 9 drill bit equivalent 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 homeowners

They need a versatile, all‑in‑one drill bit set to tackle varied household repairs without buying multiple specialized bits.

Professional carpenters

A 9‑bit equivalent reduces tool changes on the job site, speeding up framing, cabinetry, and finish work.

Automotive technicians

They frequently drill into metal, plastic, and composite panels; a compact 9‑bit solution saves space in cramped service bays.

Hobbyist makers & makerspace members

Limited bench space and budget make a multi‑function drill bit set ideal for rapid prototyping across wood, metal, and plastic projects.

Frequently Asked Questions

What is the metric equivalent of a 9/64‑inch drill bit?

A 9/64‑inch drill bit measures 0.1406 inches, which converts to about 3.57 mm. This is the closest standard metric size to the 9/64‑inch measurement.

How does a 9 mm drill bit compare to common fractional (imperial) sizes?

A 9 mm drill bit is 0.354 inches in diameter. The nearest standard fractional sizes are 11/32 in (0.3438 in) and 23/64 in (0.3594 in). Neither is an exact match, so choose the one that best fits your tolerance requirements.

When should I choose a 9 mm drill bit instead of a 9/64‑inch bit?

Use a 9 mm bit when you are working with metric‑specified holes or fasteners, such as in most European‑made equipment or when the design calls for a 9 mm clearance. Choose a 9/64‑inch bit for projects that specify imperial dimensions, especially in the United States, and when the slightly smaller 3.57 mm size is required for a tighter fit.

Are 9 mm and 9/64‑inch drill bits interchangeable?

They are not truly interchangeable. The 9 mm bit is about 0.186 mm (0.0073 in) larger than a 9/64‑inch bit. In most woodworking or general‑purpose drilling this difference is negligible, but in precision applications—such as aerospace, electronics, or fitting fasteners to exact tolerances—it can cause a loose or overly tight fit.

What are common applications for a 9 mm (or 9/64‑inch) drill bit?

Both sizes are frequently used for: - Drilling pilot holes for #8–#10 screws in wood, metal, or plastic. - Creating clearance holes for bolts and machine screws in automotive and furniture assembly. - Making holes for wiring, conduit, or small hardware in electrical work. - General‑purpose drilling in DIY projects where a medium‑size hole is needed.

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.

View All Articles by Tom Woodward