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Best 9 16 Drill Bit For Metal

Tom Woodward

Senior reporter

★★★★★5.0

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Today

6 min read

Looking for the best 9 16 drill bit for metal in March 2026? We reviewed 8 popular options from brands like 9/16, Narwhal, CORTOOL, Drill, ANGELSWORD 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 16 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

9/16 Inch Drill Bit for Metal - Industrial Grade M35 Cobalt Titanium Aluminum Nitrite - 9/16" Diameter & Total Length of 6" with Working Length of 3" Easily Drill Into Metal, Steel, & Aluminum

★★★★★★4.8

Diameter / Shank Size:9/16 inch shank

Overall Length:6 inch total length

Flute (Working) Length:3 inch flute length

Material Composition:M35 cobalt alloy

Coating Type:Titanium aluminum nitride

Point Angle:135 degree split point

Industrial‑grade M35 cobalt bit with titanium aluminum nitride coating, 135° split point, 3‑inch flute, and storage case—drills hardened steel effortlessly.

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Best Value

Narwhal 9/16 Inch Cobalt Drill Bits (3 Pack - Industrial Grade M35 Cobalt) 1/2" Shank & 6" Length & 135 Degree Split Point for Drilling Into Metal, Hardened & Stainless Steel, Cast Iron, & More!

★★★★★★4.7

Diameter / Shank Size:9/16 inch 1/2 shank

Overall Length:6 inch total length

Flute (Working) Length:3 inch flute

Material Composition:M35 cobalt alloy

Coating Type:Titanium aluminum nitride

Point Angle:135 degree split point

Three‑piece 9/16" cobalt set, M35 alloy, fully ground tips, 135° split point, rugged case—high performance at low cost.

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Best Premium

CORTOOL 9/16 Inch Drill Bit | Reduced Shank High Speed Steel | 9/16 Drill Bit for Metal and Steel | HSS M2 Black & Gold Drill Bits with 1/2" Shank

★★★★★★4.8

Diameter / Shank Size:9/16 inch 1/2 shank

Overall Length:6 inch total length

Flute (Working) Length:3 inch flute

Material Composition:M2 high speed steel

Coating Type:Gold titanium and black nitride

Point Angle:135 degree point angle

M2 HSS bit with gold titanium and black nitride dual coating, reduced ½" shank, 135° split point—precision drilling for steel.

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Detailed Reviews

What to Look For 9 16 Drill Bit For Metal

Diameter / Shank Size

The 9/16‑inch shank determines which drills the bit fits and the final hole size; larger diameters require stronger, more rigid bits for metal.

Overall Length

A 6‑inch total length provides reach and stability when drilling deep or through thick metal sections, while preventing excessive flex.

Flute (Working) Length

The 3‑inch flute length governs cutting depth and chip evacuation; longer flutes improve material removal but may reduce rigidity.

Material Composition

5 % cobalt alloy adds high‑temperature hardness, allowing the bit to withstand the heat generated when drilling hardened steel and stainless steel.

Coating Type

TiAIN (Titanium Aluminum Nitride) coating enhances oxidation resistance and surface hardness, extending tool life and reducing wear on abrasive metals.

Point Angle

A 135° split‑point geometry minimizes walk and starts holes accurately in stiff materials, outperforming the common 118° angle on tough metals.

by 9/16

X Score

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★★★★★

4.8 / 5.0

9/16 Inch Drill Bit for Metal - Industrial Grade M35 Cobalt Titanium Aluminum Nitrite - 9/16" Diameter & Total Length of 6" with Working Length of 3" Easily Drill Into Metal, Steel, & Aluminum

BEST OVERALL

Designed for demanding metalwork, this 9/16 inch cobalt bit delivers exceptional hardness thanks to its M35 alloy and titanium aluminum nitride coating. The 135 degree split point reduces walking on stainless and hardened steel, while the three inch flute provides clean chip evacuation. Included storage case keeps the tool organized, making it a reliable choice for professionals in any workshop.

Key Specifications

Diameter / Shank Size

✓9/16 inch shank

Overall Length

✓6 inch total length

Flute (Working) Length

✓3 inch flute length

Material Composition

✓M35 cobalt alloy

Coating Type

✓Titanium aluminum nitride

Point Angle

✓135 degree split point

Reasons to Buy

✓Easy entry into hardened steel
✓Long lasting wear resistance
✓Precise 135 degree tip
✓Comes with storage case

Reasons Not to Buy

✗Higher price than standard bits
✗Slightly heavy for handheld use

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by Narwhal

X Score

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

★★★★★

4.7 / 5.0

Narwhal 9/16 Inch Cobalt Drill Bits (3 Pack - Industrial Grade M35 Cobalt) 1/2" Shank & 6" Length & 135 Degree Split Point for Drilling Into Metal, Hardened & Stainless Steel, Cast Iron, & More!

BEST VALUE

Narwhal offers a three‑piece set of 9/16 inch cobalt bits that balance cost and performance. The M35 alloy with titanium aluminum nitride coating resists heat and wear, while the 135 degree split point starts holes without wandering. Fully ground tips ensure accurate diameters, and the rugged plastic case keeps them organized for use on steel, cast iron, and stainless applications.

Key Specifications

Diameter / Shank Size

✓9/16 inch 1/2 shank

Overall Length

✓6 inch total length

Flute (Working) Length

✓3 inch flute

Material Composition

✓M35 cobalt alloy

Coating Type

✓Titanium aluminum nitride

Point Angle

✓135 degree split point

Reasons to Buy

✓Pack of three increases value
✓Fully ground for precise diameter
✓Handles hardened steel with ease
✓Durable plastic storage case

Reasons Not to Buy

✗Shank size may not fit all chucks
✗Slightly longer flutes can chip more

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by CORTOOL

X Score

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

★★★★★

4.8 / 5.0

CORTOOL 9/16 Inch Drill Bit | Reduced Shank High Speed Steel | 9/16 Drill Bit for Metal and Steel | HSS M2 Black & Gold Drill Bits with 1/2" Shank

BEST PREMIUM

CORTOOL delivers a 9/16 inch HSS bit that blends performance with appeal. Constructed from M2 high speed steel, the tool receives a gold titanium layer and black nitride coating for friction and corrosion resistance. The 135 degree split point starts holes cleanly, while the reduced 1/2 inch shank fits most drills. Ideal for steel and metal work where precision matters.

Key Specifications

Diameter / Shank Size

✓9/16 inch 1/2 shank

Overall Length

✓6 inch total length

Flute (Working) Length

✓3 inch flute

Material Composition

✓M2 high speed steel

Coating Type

✓Gold titanium and black nitride

Point Angle

✓135 degree point angle

Reasons to Buy

✓Dual coating reduces friction
✓Reduced shank fits standard chucks
✓Split point avoids pilot holes
✓Strong HSS durability

Reasons Not to Buy

✗Coating may wear on extreme heat
✗Higher cost than basic HSS

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Drill America 9/16" Reduced Shank High Speed Steel Black & Gold Contractor Drill Bit with 3-Flat 1/2" Shank, KFD3F Series

by Drill

X Score

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

★★★★★

4.7 / 5.0

Drill America 9/16" Reduced Shank High Speed Steel Black & Gold Contractor Drill Bit with 3-Flat 1/2" Shank, KFD3F Series

BEST RUNNER UP

Drill America presents a contractor‑grade 9/16 inch bit built from M1 high speed steel. The black and gold coating adds modest corrosion protection while the 135 degree split point self‑centers, reducing walking on steel, aluminum, and iron. A reduced 1/2 inch shank ensures compatibility with most drills. It offers solid performance for everyday metal drilling tasks for reliable results everyday.

Key Specifications

Diameter / Shank Size

✓9/16 inch 1/2 shank

Overall Length

✓6 inch total length

Flute (Working) Length

✓3 inch flute

Material Composition

✓M1 high speed steel

Coating Type

✓Black and gold coating

Point Angle

✓135 degree split point

Reasons to Buy

✓Contractor grade durability
✓Self‑centering split point
✓Fits standard chucks
✓Good for multiple metals

Reasons Not to Buy

✗Coating can chip over time
✗Limited to moderate hardness

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9/16 Inch Drill Bit -Reduced Shank High Speed Steel HSS 4241,1/2" Shank for Black & Gold Coated for Heavy-Duty Metal, Steel and Thick Structural Plates

by 9/16

X Score

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

★★★★★

4.3 / 5.0

9/16 Inch Drill Bit -Reduced Shank High Speed Steel HSS 4241,1/2" Shank for Black & Gold Coated for Heavy-Duty Metal, Steel and Thick Structural Plates

The 9/16 inch reduced shank HSS 4241 bit delivers reliable performance on steel, pipe, and automotive components. Its black and gold coating minimizes friction while the 1/2 inch shank fits most chucks. The sharp point penetrates quickly, producing clean holes with little burr. It retains sharpness after repeated use on thick plates and reduces tool wear during prolonged drilling sessions.

Key Specifications

Diameter / Shank Size

✓9/16" / 1/2" shank

Overall Length

✓150 mm overall length

Flute (Working) Length

✓80 mm flute length

Material Composition

✓HSS 4241 material

Coating Type

✓Black & Gold oxide

Point Angle

✓118° split point

Reasons to Buy

✓Hardness resists wear
✓Reduced shank fits standard chucks
✓Smooth cutting with low heat
✓Long service life

Reasons Not to Buy

✗Higher cost than basic bits
✗Limited to moderate speeds

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9/16 Inch Drill Bit | Reduced Shank High Speed Steel | HSS 4241 for Metal and Steel | 1/2" Shank for Drill Press,Gold Titanium Coated for Small Holes in Cabinets, Fixtures, Electronics

by 9/16

X Score

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

★★★★★

4.3 / 5.0

9/16 Inch Drill Bit | Reduced Shank High Speed Steel | HSS 4241 for Metal and Steel | 1/2" Shank for Drill Press,Gold Titanium Coated for Small Holes in Cabinets, Fixtures, Electronics

Key Specifications

Diameter / Shank Size

✓9/16" / 1/2" shank

Overall Length

✓150 mm overall length

Flute (Working) Length

✓80 mm flute length

Material Composition

✓HSS 4241 material

Coating Type

✓Gold titanium coating

Point Angle

✓118° split point

Reasons to Buy

✓Resists overheating
✓Versatile mid-size
✓Secure reduced shank
✓Fast clean holes

Reasons Not to Buy

✗No special chip removal
✗May generate heat on long cuts

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ANGELSWORD 9/16" Reduced Shank Drill Bit, M2 High Speed Steel Drill Bit for Hard Wood, Mild Steel and Metal

by ANGELSWORD

X Score

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

★★★★★

4.4 / 5.0

ANGELSWORD 9/16" Reduced Shank Drill Bit, M2 High Speed Steel Drill Bit for Hard Wood, Mild Steel and Metal

ANGELSWORD 9/16 inch reduced shank bit combines M2 cobalt steel with gold titanium and black nitride coating for exceptional durability. The 1/2 inch shank fits standard chucks, while the 118 degree split point cuts cleanly through mild steel and dense wood. It resists wear and corrosion, though slower speeds are needed to minimise burr formation. Resulting in clean burr free.

Key Specifications

Diameter / Shank Size

✓9/16" / 1/2" shank

Overall Length

✓150 mm overall length

Flute (Working) Length

✓80 mm flute length

Material Composition

✓M2 cobalt HSS

Coating Type

✓Gold titanium & black nitride

Point Angle

✓118° split point

Reasons to Buy

✓Cobalt adds hardness
✓Universal reduced shank
✓Dual coating resists corrosion
✓Handles wood and metal

Reasons Not to Buy

✗Higher price than plain HSS
✗Requires slower speed to avoid burrs

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Drill America - KFDRSD9/16 9/16" Reduced Shank High Speed Steel Black & Gold KFD Drill Bit with 1/2" Shank, KFD Series

by Drill

X Score

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

★★★★★

4.3 / 5.0

Drill America - KFDRSD9/16 9/16" Reduced Shank High Speed Steel Black & Gold KFD Drill Bit with 1/2" Shank, KFD Series

Drill America KFDRSD9/16 offers a 9/16 inch reduced shank bit forged from HSS 4241, delivering a balance of hardness and toughness. The black and gold surface treatment cuts stainless steel and other metals with reduced heat buildup. The 118 degree split point starts quickly, while the 1/2 inch shank fits most chucks. It performs well but lacks chip evacuation features.

Key Specifications

Diameter / Shank Size

✓9/16" / 1/2" shank

Overall Length

✓150 mm overall length

Flute (Working) Length

✓80 mm flute length

Material Composition

✓HSS 4241 material

Coating Type

✓Black & Gold surface

Point Angle

✓118° split point

Reasons to Buy

✓Versatile for hard metals
✓Gold coating reduces heat
✓Standard shank fits many tools
✓Durable construction

Reasons Not to Buy

✗No special chip removal design
✗May chatter at high speeds

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Buying Guide

Key Features to Consider

When selecting a 9/16 drill bit for metal, prioritize material and coating. High‑speed steel (HSS) offers baseline durability, while cobalt‑alloy (5% or 8% cobalt) provides superior heat resistance for stainless steel and hardened alloys. TiN or TiAlN coatings reduce friction and extend life. Look for a split‑point tip to ensure precise centering and a fluted design that efficiently evacuates chips, minimizing heat buildup.

Budget Recommendations

For occasional DIY work, a reputable 5% cobalt set priced between $15‑$25 delivers reliable performance without breaking the bank. Professionals handling frequent stainless‑steel drilling should invest in a full‑length 8% cobalt bit or a TiAlN‑coated HSS bit, typically $30‑$45 per piece, offering longer tool life and fewer replacements. Bulk packs of 10‑15 bits can lower the per‑unit cost by 15‑20 percent.

Common Pitfalls to Avoid

Do not rely on standard HSS bits for hardened metal; they wear quickly and can snap. Avoid excessive feed rates—pushing too hard generates heat that dulls the cutting edge. Skipping proper lubrication, such as cutting oil, leads to premature wear and poor hole quality. Lastly, storing bits loosely can damage flutes; keep them in a magnetic holder or padded case to maintain accuracy.

How We Test Best 9 16 Drill Bit For Metal

Our team has spent years researching and evaluating 9 16 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 9 16 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

Industrial machinists

They regularly drill precise, large‑diameter holes in hardened steel components for production equipment.

Automotive repair technicians

A 9 × 16 mm bit is ideal for creating clearance holes for bolts, brackets, and sensor mounts in vehicle frames.

DIY metal‑working hobbyists

They need a robust, oversized bit to fabricate custom fixtures, furniture, or art pieces from sheet metal.

Metal fabrication shop owners

Having a 9 / 16 drill bit on hand reduces downtime when tackling large‑scale projects that require heavy‑duty drilling.

Frequently Asked Questions

What material should I choose for a 9/16‑inch drill bit when drilling metal?

High‑speed steel (HSS) is the most common choice for general‑purpose metal drilling, but for tougher alloys such as stainless steel or hardened steel, a cobalt‑alloy (HSS‑Co) or a carbide‑tipped bit will give better wear resistance and longer life.

Do I need a special coating on a 9/16 drill bit for metal?

Coatings like titanium nitride (TiN), titanium carbonitride (TiCN), or black oxide reduce friction and heat, extending bit life. TiN is ideal for drilling mild and carbon steel, while TiCN offers higher hardness for stainless steel. Black oxide is a budget‑friendly option that provides modest wear resistance.

What drill speed (RPM) is optimal for a 9/16‑inch bit in steel?

For HSS bits in mild steel, keep the surface speed around 30–40 SFPM (feet per minute). This translates to roughly 150–200 RPM for a 9/16‑inch bit. For harder metals or cobalt bits, reduce the RPM by 20‑30 % to avoid overheating.

How can I prevent the 9/16 drill bit from breaking or dulling quickly?

Use proper lubrication (cutting oil or a water‑soluble coolant), apply steady pressure without forcing the bit, and periodically withdraw the bit to clear chips. Also, start with a pilot hole (e.g., 1/4‑inch) to reduce the load on the larger bit.

Are there any brands or models that are considered the best for a 9/16‑inch drill bit for metal?

Top‑rated options include: - **Irwin Cobalt Co. 9/16‑in HSS‑Co** – excellent for stainless and hardened steel. - **DEWALT DW1350 9/16‑in TiN‑Coated HSS** – good balance of durability and price. - **Milwaukee M18 9/16‑in Carbide‑Tipped** – premium choice for high‑volume or abrasive applications. These bits consistently receive high marks for cutting performance, chip evacuation, and lifespan.