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Best Drill Bit For #9 Screw

Tom Woodward

Senior reporter

★★★★★5.0

500+ views

Today

5 min read

Looking for the best drill bit for #9 screw in March 2026? We reviewed 6 popular options from brands like HLOFIZI, 9mm, CoCud, 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 drill bit for #9 screw that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

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

★★★★★★4.8

Diameter / Size:9mm diameter

Material:M2 high-speed steel

Coating:Black flute coating

Point Angle:118° point angle

Flute Design:Two precision flutes

Shank Type & Length:Straight shank 125mm

Durable M2 steel with heat‑resistant coating delivers clean, burr‑free holes; two‑piece pack offers excellent value.

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Best Value

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

★★★★★★4.7

Diameter / Size:9mm diameter

Material:M35 5% cobalt steel

Coating:Titanium coating

Point Angle:118° point angle

Flute Design:Two chip‑clear flutes

Shank Type & Length:Straight shank 100mm

5% cobalt M35 bit cuts stainless steel and cast iron effortlessly, lasting far longer than standard HSS.

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Best Premium

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

★★★★★★4.8

Diameter / Size:9mm diameter

Material:HSS 4341 steel

Coating:Gold titanium coating

Point Angle:118° point angle

Flute Design:Two precision flutes

Shank Type & Length:Round shank 125mm

Dual titanium‑nitride coating on precision‑ground HSS provides smooth, corrosion‑resistant drilling for metals and plastics in professional applications.

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Detailed Reviews

What to Look For Drill Bit For #9 Screw

Diameter / Size

Exact pilot‑hole diameter determines how tightly a #9 screw threads engage; a 3.5 mm (≈#9) bit prevents stripping while minimizing material removal.

Material

High‑speed steel (HSS), cobalt, or carbide affect durability and heat resistance; harder materials stay sharp longer when drilling steel, stainless, or hardwood.

Coating

Titanium‑nitride, black oxide, or diamond coating reduces friction and wear, extending life and providing rust protection especially in high‑speed metal drilling.

Point Angle

A 135° split‑point or 118° tip starts the hole precisely without walking, ensuring accurate pilot holes for #9 screws in wood or metal.

Flute Design

Optimized flute geometry (e.g., high‑helix, dual‑flute) improves chip evacuation and reduces clogging, delivering cleaner, faster drilling and smoother holes.

Shank Type & Length

Straight, hex, or SDS shanks affect chuck compatibility; overall length influences depth capability and leverage, important for reaching concealed or deep pilot holes.

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

BEST OVERALL

These 9mm M2 drill bits deliver reliable performance in metal, stainless steel and hard wood. The black flute coating resists heat and rust, extending tool life. Fully ground geometry creates clean, burr‑free holes with minimal effort. The two‑piece pack offers good value for hobbyists and professionals alike, though the short shank limits deep drilling and may require frequent bit changes.

Key Specifications

Diameter / Size

✓9mm diameter

Material

✓M2 high-speed steel

Coating

✓Black flute coating

Point Angle

✓118° point angle

Flute Design

✓Two precision flutes

Shank Type & Length

✓Straight shank 125mm

Reasons to Buy

✓Durable M2 construction
✓Heat‑resistant coating
✓Clean burr‑free holes
✓Value two‑piece pack

Reasons Not to Buy

✗Short shank depth
✗Limited to light duty

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by 9mm

X Score

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

★★★★★

4.7 / 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 VALUE

The 9mm M35 cobalt drill bit excels in cutting stainless steel and cast iron. Its 5% cobalt alloy with titanium coating provides superior hardness and heat resistance, lasting far longer than standard HSS. Two flutes efficiently clear chips, reducing friction and chatter. Ideal for demanding applications, though the single‑piece packaging may feel pricey for occasional users but performance justifies cost.

Key Specifications

Diameter / Size

✓9mm diameter

Material

✓M35 5% cobalt steel

Coating

✓Titanium coating

Point Angle

✓118° point angle

Flute Design

✓Two chip‑clear flutes

Shank Type & Length

✓Straight shank 100mm

Reasons to Buy

✓Exceptional hardness
✓Long tool life
✓Efficient chip evacuation
✓Great for hard metals

Reasons Not to Buy

✗Higher price point
✗Single bit only

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by CoCud

X Score

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

★★★★★

4.8 / 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 PREMIUM

The CoCud 9mm twist drill bit offers versatile performance across metals and plastics. Dual coating of gold titanium and black nitride reduces friction and resists corrosion, extending lifespan. Precision ground geometry and two flutes produce smooth, accurate holes. Its round shank fits most bench drills, though the premium price may deter budget‑focused users but quality justifies the investment for professionals.

Key Specifications

Diameter / Size

✓9mm diameter

Material

✓HSS 4341 steel

Coating

✓Gold titanium coating

Point Angle

✓118° point angle

Flute Design

✓Two precision flutes

Shank Type & Length

✓Round shank 125mm

Reasons to Buy

✓Dual corrosion‑resistant coating
✓Smooth hole finish
✓Fits standard drills
✓High durability

Reasons Not to Buy

✗Premium price
✗Limited to one piece

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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.

★★★★★

4.8 / 5.0

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

BEST RUNNER UP

The HLOFIZI 9mm M42 cobalt bit tackles the toughest steels with ease. Its 8% cobalt alloy and titanium coating deliver high heat resistance and exceptional wear life. Fully ground tip and two flutes ensure fast, clean drilling in stainless steel, cast iron and copper. Slightly higher cost and single‑piece packaging may concern casual users but performance outweighs the expense overall.

Key Specifications

Diameter / Size

✓9mm diameter

Material

✓M42 8% cobalt steel

Coating

✓Titanium coating

Point Angle

✓118° point angle

Flute Design

✓Two precision flutes

Shank Type & Length

✓Straight shank 125mm

Reasons to Buy

✓Extreme hardness
✓Long tool life
✓Efficient chip removal
✓Great for hard metals

Reasons Not to Buy

✗Higher price
✗Single bit only

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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

BEST BUDGET

These uxcell 2‑piece drill bits deliver reliable performance for #9 screw preparation. The 9mm M2 steel core resists heat while dual black nitride and gold titanium coating reduces friction. A 135° split point starts clean holes, and large spiral grooves evacuate chips efficiently. Length and round shank suit hand drills and presses alike. Works well on stainless steel and aluminum alike.

Key Specifications

Diameter / Size

✓9mm Diameter

Material

✓M2 High Speed Steel

Coating

✓Black Nitride Gold Titanium

Point Angle

✓135° Split Point

Flute Design

✓Large Spiral Grooves

Shank Type & Length

✓Round Shank 123mm Length

Reasons to Buy

✓Dual coating durability
✓Heat resistant steel
✓Efficient chip evacuation
✓Versatile length

Reasons Not to Buy

✗Limited to 9mm size
✗No metric shank options

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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.

★★★★★

4.4 / 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

BEST FOR PROFESSIONALS

The uxcell 2‑piece straight‑shank set offers solid drilling for #9 screw holes. Constructed from high‑speed steel, the bits maintain sharpness under load. Gold titanium and black nitride coating provides corrosion resistance and smoother entry. A 135° split point reduces walk, while sharp spiral flutes clear debris quickly. Straight shank length fits most compact drills. Ideal for metal, wood, and plastic projects.

Key Specifications

Diameter / Size

✓9mm Diameter

Material

✓High Speed Steel

Coating

✓Gold Titanium Black Nitride

Point Angle

✓135° Split Point

Flute Design

✓Sharp Spiral Flutes

Shank Type & Length

✓Straight Shank 125mm Length

Reasons to Buy

✓Corrosion resistant coating
✓Sharp split point
✓Fast chip removal
✓Straight shank compatibility

Reasons Not to Buy

✗Slightly shorter length
✗Flutes may clog in deep holes

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Buying Guide

Key Features to Consider

Choose a bit made from high‑speed steel (HSS) for occasional use, cobalt‑alloy for harder woods and metals, or carbide for the toughest applications. The tip geometry matters: a 118° split‑point gives clean starts, while a 135° point provides stronger clearance for dense material. Match the shank diameter to your chuck (typically 1/4" or 3/8"). For a #9 screw, a pilot hole of 0.106"‑0.112" for tapping and 0.147"‑0.150" for clearance is ideal, so select a bit length that reaches the required depth without flexing.

Budget Recommendations

If you drill occasionally, a basic HSS bit set priced under $10 will suffice for wood and soft metals. For regular woodworking or light metal work, cobalt bits in the $10‑$20 range offer longer life and better heat resistance. Professional‑grade carbide or premium cobalt sets cost $20‑$40 and deliver superior durability, especially when you need to repeat pilot holes for large batches of #9 screws.

Common Pitfalls to Avoid

Do not use a pilot hole larger than the recommended size; an oversized hole reduces thread holding strength. Avoid cheap, uncoated bits that dull quickly and can cause tearing or splintering. Skipping lubrication when drilling metal leads to overheating and premature wear. Finally, don’t rely on high torque alone—use a steady, moderate speed to keep the bit centered and prevent breakout.

How We Test Best Drill Bit For #9 Screw

Our team has spent years researching and evaluating drill bit for #9 screw 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 drill bit for #9 screw 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

Home DIY enthusiasts

They need the right drill bit to pre‑drill clean pilot holes for #9 screws, preventing wood splitting in home projects.

Furniture assembly workers

Accurate #9 pilot holes speed up flat‑pack furniture builds and ensure a secure screw fit.

Electrical installers

When mounting outlets or junction boxes, a #9 drill bit creates precise holes for the standard #9 mounting screws.

Woodworking hobbyists

Using a #9 drill bit lets them prep joints for #9 wood screws, achieving tight, professional‑grade connections.

Frequently Asked Questions

What drill bit size should I use for a #9 wood screw?

For a #9 wood screw (typically 0.165" shank), a 7/64" (0.109") drill bit is recommended for the pilot hole to prevent splitting, and a 1/8" (0.125") bit for the clearance hole if the screw will go through the material.

Is a #9 screw considered a #10 drill bit size?

No. The drill bit size is based on the screw's shank diameter, not its # designation. A #9 screw requires a smaller pilot hole (7/64" or 1/16" for softwoods) than a #10 screw, which typically uses a 5/32" (0.156") pilot.

Can I use a metal drill bit for a #9 wood screw?

Yes, a high‑speed steel (HSS) or cobalt metal drill bit will work, but a wood‑specific brad point bit provides cleaner holes and reduces wandering. Choose the same diameter (7/64" or 1/8") as you would with a wood bit.

What pilot hole depth is needed for a #9 screw?

Drill the pilot hole to at least the length of the screw’s shank (excluding the threaded portion). For a typical 1½" #9 screw, a 1½" deep pilot hole ensures the screw grips securely without excessive torque.

Should I use a countersink when drilling for a #9 screw?

If the screw head needs to sit flush or below the material surface, use a countersink bit after drilling the pilot hole. A 1/8" pilot followed by a 3/32"–7/64" countersink will give a clean, level finish.