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Best 7 8 Drill Bit

Tom Woodward

Senior reporter

★★★★★5.0

500+ views

Today

6 min read

Looking for the best 7 8 drill bit in March 2026? We reviewed 8 popular options from brands like ANGELSWORD, Narwhal, 7/8, IRWIN, CORTOOL, Drill 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 7 8 drill bit that performs well and holds up over time, this shortlist will help you choose with confidence.

Our Top Picks

Best Overall

ANGELSWORD 7/8" Reduced Shank Drill Bit, M2 High Speed Steel Drill Bit for Hard Wood, Mild Steel and Metal

★★★★★★4.8

Shank Size & Type:1/2" Reduced Shank

Material & Coating:M2 HSS

Diameter (7/8"):7/8" Diameter

Overall Length:6" Overall Length

Maximum RPM:Max 3000 RPM

Point Angle / Tip Geometry:135° Split Point

Durable M2 steel with titanium nitride coating, reduced shank fits most drills, cuts hardwood and mild steel cleanly.

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Best Value

Narwhal 7/8 Inch Cobalt Drill Bits (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

Shank Size & Type:1/2" Shank

Material & Coating:M35 Cobalt

Diameter (7/8"):7/8" Diameter

Overall Length:6" Total Length

Maximum RPM:Max 3000 RPM

Point Angle / Tip Geometry:135° Split Point

Industrial M35 cobalt bit, fully ground 135° split point, 1/2" shank, includes sturdy case for organized storage.

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Best Premium

7/8 Inch Drill Bit for Metal - Industrial Grade M35 Cobalt Titanium Aluminum Nitrite - 7/8" Diameter & Total Length of 6" with Working Length of 3" Easily Drill Into Metal, Steel, & Aluminum

★★★★★★4.8

Shank Size & Type:1/2" Shank

Material & Coating:M35 Cobalt

Diameter (7/8"):7/8" Diameter

Overall Length:6" Overall Length

Maximum RPM:Max 3000 RPM

Point Angle / Tip Geometry:135° Split Point

Premium M35 cobalt with TiAIN coating, 135° split tip, 6" total length, case provides convenient organization.

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Detailed Reviews

What to Look For 7 8 Drill Bit

Shank Size & Type

Determines which drill presses or hand‑drills can accept the bit; a 1/2" reduced shank fits most universal chucks and provides better stability.

Material & Coating

M2 cobalt steel offers high hardness for metal, while titanium or nitride coatings increase wear resistance and reduce friction for longer tool life.

Diameter (7/8")

The cutting width defines hole size; a true 7/8" diameter ensures accurate fits for bolts, fasteners, and clearance holes in wood or metal.

Overall Length

Longer bits reach deeper cavities, but may flex; selecting appropriate length balances depth capability with rigidity for precise drilling.

Maximum RPM

Specifies the highest safe spindle speed; exceeding it can overheat the tip, cause premature wear, or generate excessive burrs in hard materials.

Point Angle / Tip Geometry

A 118° or 135° split‑point reduces walking and improves chip evacuation, crucial for clean holes in hardwoods and medium‑hard steel.

by ANGELSWORD

X Score

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

★★★★★

4.8 / 5.0

ANGELSWORD 7/8" Reduced Shank Drill Bit, M2 High Speed Steel Drill Bit for Hard Wood, Mild Steel and Metal

BEST OVERALL

The ANGELSWORD 7/8 inch reduced shank bit combines industrial M2 steel with a titanium and nitride coating for long life. Its 135 degree split point cuts cleanly through hardwood and mild steel up to 0.75 inch thick. Use lower speeds to minimise burrs. The universal shank fits most presses and cordless drills without issue. It also resists corrosion during storage.

Key Specifications

Shank Size & Type

✓1/2" Reduced Shank

Material & Coating

✓M2 HSS

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓6" Overall Length

Maximum RPM

✓Max 3000 RPM

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓Durable cobalt coating
✓Reduced shank fits many tools
✓Handles hard wood well
✓Low burr formation

Reasons Not to Buy

✗No price listed
✗Limited to softer metals

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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 7/8 Inch Cobalt Drill Bits (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

The Narwhal 7/8 inch cobalt bit features M35 steel with five percent cobalt for strength. A fully ground 135 degree split point starts holes without wandering, even in hardened stainless steel. The 1/2 inch shank slides into most drills, while the six inch length provides ample reach. Packaging includes a durable case for organization and transport and easy storage solution.

Key Specifications

Shank Size & Type

✓1/2" Shank

Material & Coating

✓M35 Cobalt

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓6" Total Length

Maximum RPM

✓Max 3000 RPM

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓Full ground precision
✓135 degree tip reduces walking
✓Includes sturdy plastic case
✓Effective on hardened steel

Reasons Not to Buy

✗Flute length short for deep holes
✗No coating beyond cobalt

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by 7/8

X Score

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

★★★★★

4.8 / 5.0

7/8 Inch Drill Bit for Metal - Industrial Grade M35 Cobalt Titanium Aluminum Nitrite - 7/8" Diameter & Total Length of 6" with Working Length of 3" Easily Drill Into Metal, Steel, & Aluminum

BEST PREMIUM

This industrial M35 cobalt bit combines five percent cobalt with a titanium aluminum nitride coating for exceptional hardness and oxidation resistance. The 135 degree split point starts clean holes in stainless and hardened steel, while the 1/2 inch shank fits standard drills. At six inches total length the three inch flute reaches depths, and a case keeps bits organized.

Key Specifications

Shank Size & Type

✓1/2" Shank

Material & Coating

✓M35 Cobalt

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓6" Overall Length

Maximum RPM

✓Max 3000 RPM

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓TiAIN coating adds hardness
✓135 degree tip reduces walking
✓Includes storage case
✓Handles stainless steel well

Reasons Not to Buy

✗Higher price than basic bits
✗Flute length limited to 3 inches

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IRWIN SPEEDBOR Tri Flute Wood Drill Bit 7/8" X 6"(3041005)

by IRWIN

X Score

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

★★★★★

4.7 / 5.0

IRWIN SPEEDBOR Tri Flute Wood Drill Bit 7/8" X 6"(3041005)

BEST RUNNER UP

The IRWIN SPEEDBOR 7/8 inch wood bit uses a tri‑flute design that pushes chips out quickly, reducing binding in dense timber. Its full screw tip self‑feeds, while three cutting edges produce clean, accurate holes. The 1/2 inch shank fits most drills and the six inch length handles deep passes. Ideal for cabinetry and furniture work. It resists wear over time.

Key Specifications

Shank Size & Type

✓1/2" Shank

Material & Coating

✓Tri-Flute Design

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓6" Overall Length

Maximum RPM

✓Max 3500 RPM

Point Angle / Tip Geometry

✓Full Screw Tip

Reasons to Buy

✓Fast chip ejection
✓Self-feeding tip
✓Three cutting edges
✓Durable carbide tip

Reasons Not to Buy

✗Not intended for metal
✗Higher cost than basic wood bits

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7/8 Inch Drill Bit | Reduced Shank High Speed Steel | HSS 4241 for Steel and Iron | 1/2" Shank for Heavy Duty Drilling

by 7/8

X Score

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

★★★★★

4.3 / 5.0

7/8 Inch Drill Bit | Reduced Shank High Speed Steel | HSS 4241 for Steel and Iron | 1/2" Shank for Heavy Duty Drilling

BEST BUDGET

The 7/8 inch HSS 4241 bit delivers reliable performance on thick steel and iron. Its reduced 1/2 inch shank fits high‑torque machines without wobble, while the robust construction tolerates extreme pressure. Ideal for workshop and job‑site use, the bit maintains sharpness after repeated passes, though it lacks a premium coating for extended life. Overall it offers value for demanding tasks.

Key Specifications

Shank Size & Type

✓1/2" Reduced Shank

Material & Coating

✓HSS 4241 Steel

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓3" Overall Length

Maximum RPM

✓5000 RPM Max

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓Durable under high pressure
✓Reduced shank prevents wobble
✓Handles thick metal
✓Good price point

Reasons Not to Buy

✗No advanced coating
✗Limited RPM rating

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CORTOOL 7/8 Inch Drill Bit | Reduced Shank High Speed Steel | 7/8 Drill Bit for Metal and Steel | HSS M2 Black & Gold Drill Bits with 1/2" Shank

by CORTOOL

X Score

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

★★★★★

4.4 / 5.0

CORTOOL 7/8 Inch Drill Bit | Reduced Shank High Speed Steel | 7/8 Drill Bit for Metal and Steel | HSS M2 Black & Gold Drill Bits with 1/2" Shank

BEST FOR PROFESSIONALS

CORTOOL 7/8 inch HSS M2 bit combines black nitride and gold titanium coatings for superior lubrication and corrosion resistance. The 135 degree split‑point tip penetrates hard steel without pilot holes, reducing chip buildup. Its reduced 1/2 inch shank locks securely in high‑speed drills, delivering consistent finish for professional applications, though the price reflects the premium features. justifies the cost well

Key Specifications

Shank Size & Type

✓1/2" Reduced Shank

Material & Coating

✓M2 HSS Gold/Titanium

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓3" Overall Length

Maximum RPM

✓6000 RPM Max

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓Dual coating resists corrosion
✓Sharp split‑point reduces clogging
✓Secure reduced shank
✓Excellent finish on steel

Reasons Not to Buy

✗Higher price point
✗Limited to moderate RPM

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Drill America - DWDRSD7/8 7/8" Reduced Shank High Speed Steel Drill Bit with 1/2" Shank, DWDRSD 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 - DWDRSD7/8 7/8" Reduced Shank High Speed Steel Drill Bit with 1/2" Shank, DWDRSD Series

BEST FOR BEGINNERS

Drill America DWDRSD7/8 offers a straightforward HSS design with black oxide treatment that improves lubricity and coolant retention. The 1/2 inch reduced shank fits most drills, providing stable entry for novices. While the bit handles general metal and wood tasks adequately, its basic coating limits lifespan under heavy use, making it best for occasional projects and easy to replace today

Key Specifications

Shank Size & Type

✓1/2" Reduced Shank

Material & Coating

✓HSS Black Oxide

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓3" Overall Length

Maximum RPM

✓4500 RPM Max

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓Simple black oxide coating
✓Fits most drill chucks
✓Good for metal and wood
✓Affordable for beginners

Reasons Not to Buy

✗Coating wears quickly
✗Lower RPM rating

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7/8 Inch Drill Bit,Reduced Shank Drill Bits for Metal Wood and Plastic,4241 High Speed Steel Black & Gold Drill Bit with 1/2 Inch Shank

by 7/8

X Score

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

★★★★★

4.5 / 5.0

7/8 Inch Drill Bit,Reduced Shank Drill Bits for Metal Wood and Plastic,4241 High Speed Steel Black & Gold Drill Bit with 1/2 Inch Shank

BEST PREMIUM PICK

This 7/8 inch 4241 HSS bit features a dual black and gold coating that maximizes wear resistance and reduces friction across metal, hardwood, and plastic. The 1/2 inch reduced tri‑flat shank locks tightly in drill presses and handheld tools, delivering precise, clean holes. Though premium priced, its longevity and versatility justify the investment for serious craftsmen and superior performance today

Key Specifications

Shank Size & Type

✓1/2" Reduced Tri-Flat Shank

Material & Coating

✓HSS 4241 Dual Coating

Diameter (7/8")

✓7/8" Diameter

Overall Length

✓3" Overall Length

Maximum RPM

✓5500 RPM Max

Point Angle / Tip Geometry

✓135° Split Point

Reasons to Buy

✓Dual coating extends life
✓Tri-flat shank prevents slip
✓Handles metal wood plastic
✓Precise clean holes

Reasons Not to Buy

✗Higher cost than basics
✗Requires careful handling

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Buying Guide

Key Features to Consider

When selecting a 7/8‑inch drill bit, prioritize material and coating. High‑speed steel (HSS) works for general wood and metal, while cobalt or carbide tips excel on hardened steel and stainless. A TiN (titanium nitride) or TiAlN coating extends life and reduces friction. Check the shank type—quick‑change hex or SDS‑plus ensures compatibility with most rotary hammers and impact drivers. Finally, verify the tolerance and runout specifications; tighter tolerances deliver smoother holes and less wobble.

Budget Recommendations

For occasional DIY tasks, a solid HSS bit in the $10‑$15 range offers reliable performance on wood and soft metals. Professionals needing durability should look at cobalt‑alloy or carbide‑tipped options priced between $25‑$40; these maintain sharpness longer under high torque. Premium bits with advanced TiAlN coating and precision‑ground geometry can run $45‑$60, delivering the best chip evacuation and reduced heat buildup for heavy‑duty applications.

Common Pitfalls to Avoid

Do not assume a larger diameter automatically means a stronger bit; some oversized bits are thin‑walled and prone to breakage under impact. Avoid using a standard twist bit for hammer drilling on concrete—use a dedicated SDS‑plus masonry bit instead. Lastly, never operate a drill bit at excessive speed; high RPM on hard alloys generates heat that dulls the edge quickly. Match speed to material and use proper coolant or lubrication when drilling metal.

How We Test Best 7 8 Drill Bit

Our team has spent years researching and evaluating 7 8 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 7 8 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

Professional carpenters

A 7/8" drill bit handles large pilot holes for structural timber joinery, speeding up framing work.

DIY home‑renovation enthusiasts

It lets hobbyists quickly bore through thick wall studs and floor joists when installing shelves or wiring.

Automotive mechanics

The size is ideal for creating clearance holes for bolt‑on accessories and engine mounts on steel components.

Furniture makers & woodworkers

Large dowel or mortise holes require a 7/8" bit, ensuring strong, precise connections in custom pieces.

Frequently Asked Questions

What size does a 7/8" drill bit refer to?

A 7/8" (seven‑eighths of an inch) drill bit has a diameter of 0.875 inches (22.23 mm). It is commonly used for drilling large holes in wood, metal, and plastics.

Which material is best for a 7/8" drill bit when drilling metal?

For metal, a 7/8" drill bit made from cobalt‑based alloy (M35 or M42) or high‑speed steel (HSS) with a titanium nitride (TiN) coating provides the best wear resistance and heat dissipation.

Can I use a 7/8" drill bit for wood without a special coating?

Yes. Standard high‑speed steel (HSS) or a carbide‑tipped 7/8" bit works well in wood. A split‑point or brad‑point tip reduces wandering and gives cleaner holes.

What type of shank should I look for on a 7/8" drill bit for a standard drill press?

A 3‑jaw chuck‑compatible round shank (usually 1/2" or 5/8" diameter) is standard. If you need extra rigidity, a SDS‑plus or SDS‑max shank is preferred for hammer drills.

How do I maintain and extend the life of a 7/8" drill bit?

Keep the bit sharp by regularly deburring and using a proper sharpening jig. Apply cutting fluid when drilling metal, avoid overheating, and store bits in a dry case to prevent rust.