The best earth auger drill bits, compared.
Top pick: K-Brands 4 × 41 cm and 9 × 41 cm – Two 41 cm bits and 4.5 from 4,267 reviews on this listing, the highest score in the set. Best value: WORKPRO green 4 × 22 cm and 8 × 30 cm – Lowest WORKPRO price here, about £13.99, when 22 cm and 30 cm fit the hole. Updated October 2026.
An earth auger drill bit is a steel spiral that fits a drill chuck and bores soil for bulbs, bedding plants, and light post holes. UK buyers on amazon.co.uk are mostly home gardeners who already own a cordless drill and want to stop using a trowel for dozens of holes. Diameter, shank, and drill are set out in the [earth auger drill bit buying guide](/hub/digging-tools/earth-auger-drill-bit/sub/earth-auger-drill-bit-buying-guide). Quality is a locked 3/8 in hex shank, a diameter and length that match the job, and a shaft that does not rely on a joint the reviews say can snap. Sets pair a narrow bit with a wider one.
An earth auger drill bit is a steel spiral that fits a drill chuck and bores soil for bulbs, bedding plants, and light post holes.
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Personal buying guide
Question 1 of 2
What hole are you drilling?
The K-Brands pair is listed as 4 × 41 cm and 9 × 41 cm in alloy steel, weighing 1.03 kg, at £24.99. The amazon.co.uk line is 4.5 from 4,267 reviews, the highest star rating in this set, and the sample belongs to this listing rather than a copied WORKPRO count, which is why it is the top pick when you want two longer bits. Bullets describe bulb planting and small stakes, and they say the drill is not included. Reviewers praise bulbs, clay planting, and a hole of about 24 inches for a 3x3 post when both bits are used, with the small bit first on tough roots. They also report kickback, so two hands and low revs come up often, and high revs fling soil. No side handle is supplied. The shank conflicts on the page: the bullets say 3/8 in hex, while the feedback field says straight, and the finish bullets claim a rust-resistant coating while the feedback field says uncoated.
Pros
Cons
Best for: You want two longer bits for bulbs and small posts, and you will check the shank on the live listing before you chuck it.
Less suitable: A job that needs a confirmed hex-only fit, a side handle in the box, or a hole wider than the 9 cm bit.
Specifications
Common questions
Can it plant bulbs?
The bullets and reviews describe bulb planting and small stakes. A drill is not included.
What is it made of?
The listing says alloy steel. The bullets mention a rust-resistant coating, while the finish field says uncoated.
Do you need your own drill?
Yes. The bullets say the drill is not included.
The WORKPRO green pair lists a 4 × 22 cm bit and an 8 × 30 cm bit in carbon steel, with a 3/8 in hex shank and a listed weight of 637 g. At £13.99 it is the lowest-priced WORKPRO set in this comparison, which is why it is the best value when those shorter lengths match the hole. The listing shows 4.4 from 6,370 reviews, the same star line printed on the other WORKPRO ASINs here. The bullets suggest an 18 V drill or higher, with 14 V written as a minimum, and they say the bits are for soil, bulbs, seedlings, and small plants, not roots or rock. Review text on the listing matches the black WORKPRO sample: buyers praise the smaller bit for bulbs, hard earth, and fence posts where stones are not large. The same reviews call the bits too short, with a steep flight, and say soil falls back into the hole. A stone stops the cut. No storage case is listed among the included components.
Pros
Cons
Best for: You want a short pair for bulbs and a wider soil hole, and 22–30 cm is enough for the job.
Less suitable: A deep fence footing, rocky ground, or a hole that needs more than 30 cm of working length.
Specifications
Common questions
What material is listed?
The feedback field says carbon steel. The bullets say high-strength heat-treated steel.
Can you use it for planting?
The bullets say bulbs, seedlings, and small plants, and say not to drill roots or rock.
Does a case come with it?
The listing asks about a storage case. No case is listed in the included components.
The black WORKPRO set lists a 4 × 42 cm bit and a 9 × 40 cm bit with a 3/8 in hex shank, model W004649, at £16.99 and 920 g. The listing shows 4.4 from 6,370 reviews, the same figure printed on the other WORKPRO ASINs, and the date first available is 14 Nov. 2025. Bullets say heat-treated high-strength steel, suggest 18 V or higher with 14 V as a written minimum, and say the bits are not recommended for roots or rock. In the review sample, the narrower bit is the one buyers single out for one bulb, and the larger bit for small pots, with some success in poor new-build soil and fence posts where stones were not substantial. The same reviews call the bits far too short, with a steep blade that buries the auger in a few turns, and say soil falls back into the hole. A stone stops the cut. Some reviewers in that sample had not used the bits.
Pros
Cons
Best for: You want a two-diameter black set around 40 cm for bulbs and small pots in soil without substantial stones.
Less suitable: Rocky ground, tree roots, or a hole the shared reviews already call too short.
Specifications
Common questions
Can you plant bulbs with it?
The bullets describe bulb planting, and reviews mention bulbs. The narrower bit is the one reviewers single out for one bulb.
Which drill does it fit?
The listing says a 3/8 in hex shank for a 3/8 in or larger chuck, and suggests 18 V or higher.
Does it include a drill?
No. The pack is the auger bit set.
The black WORKPRO pair lists 4 × 22 cm and 8 × 30 cm, part W005005A, at £19.94 with a listed weight of 454 g. It shows 4.4 from 6,370 reviews, the same count as the other WORKPRO ASINs, and the review titles match the longer black WORKPRO set. The bullets say heavy-duty manganese steel and a 3/8 in hex, and they suggest 18 V or higher with 14 V written as a minimum. They also warn that the bits may struggle in hard, rocky, or compacted soil. The shared review sample praises hard earth, the smaller bit for bulbs, and fence posts in cleaner soil. The same reviews call the bits too short with a steep blade, say dirt falls back into the hole, and say the cut stops on stones. At £19.94 this pair costs more than the green WORKPRO set of the same listed sizes.
Pros
Cons
Best for: You want the short black WORKPRO pair for bulbs and an 8 cm hole in soil that is not rocky.
Less suitable: Compacted or stony ground, or a post hole deeper than the 30 cm bit.
Specifications
Common questions
Will a cordless drill run it?
The bullets say a 3/8 in or larger chuck and suggest 18 V or higher, with 14 V written as a minimum.
What is it made of?
The bullets say heavy-duty manganese steel.
Does it include a drill?
No.
The Insaga bit is titled 7.5 × 81 cm in carbon steel with an orange powder coating, a 10 mm hex shank, and a listed weight of 1.22 kg, at £19.99. The listing shows 4.3 from 330 reviews, though the raw sample holds five UK reviews. One of those describes a fence-post hole nearly 2 ft deep with a combi drill, and another mentions heavy clay. None of those five spell out a defect. The bullets say the bit suits clay, loose soil, dry soil, or sand, and they tell you to use both hands and avoid high speed so a root does not twist your wrist. A feedback field lists a cutting diameter of 24.89 mm, which conflicts with the 7.5 cm title. Included components says no, so the drill is not in the box. The suggested drill on the listing is an 18 V or higher cordless.
Pros
Cons
Best for: You want one long carbon-steel bit for a deep hole in clay, loose soil, or sand, and you will keep both hands on the drill.
Less suitable: A job that needs a confirmed 7.5 cm cut, a long sample of defect reports, or a drill in the box.
Specifications
Common questions
Can it plant bulbs?
The title includes bulb planting. The saved listing has five UK reviews, one of which describes a fence-post hole nearly 2 ft deep.
Is it steel, and is a drill included?
Material is carbon steel. Included components says no, so the drill is not in the box.
What safety note is on the listing?
The bullets say to use both hands and avoid high speed so a root does not twist your wrist.
The Suewidfay listing is priced at £13.89, weighs 1.05 kg, and shows 4.2 from 194 reviews, the same star line as the other Suewidfay ASIN. The title says 10 × 40 cm and 4 × 22 cm, while the bullets also say 4 × 40 cm and 4 × 22 cm, so the piece count is not stated. It is manganese steel with a black oxide finish and a hex shank, and the bullets suggest 18 V or higher for a 3/8 in or larger chuck. Reviews describe tulip and daffodil holes faster than by hand, and some buyers report heavy clay with no trouble, including hard soil with brick fragments in Bosch and Makita chucks. Others say the smaller bit bent in solid summer ground, the larger shank was damaged, a battery drill would not go deep enough, or the largest size compacted a small hole instead of lifting soil. The listing does not claim stainless steel. The review text matches the other Suewidfay ASIN, so the 194 count may be a parent rating.
Pros
Cons
Best for: You want a low-priced hex auger for bulbs in soil your battery drill can already turn, and you will check which sizes are in the box.
Less suitable: Solid summer ground, rock, or a drill that stalls before the bit reaches the listed depth.
Specifications
Common questions
Will it work in compacted soil?
Reviews conflict. Some buyers report heavy clay with no trouble. Others say it would not penetrate, bent the smaller bit, or compacted a small hole.
Is it stainless steel?
No stainless claim is on the listing. It says manganese steel with a black coating.
Does it include a drill?
No.
This Suewidfay set lists three sizes, 4.6 × 37 cm, 8 × 30 cm, and 4 × 22 cm, in manganese steel with a black oxide finish, at £17.59 and 940 g. The amazon.co.uk line is 4.2 from 194 reviews, and the review bodies match the other Suewidfay ASIN. The bullets say a 3/8 in hex chuck and suggest 18 V or higher, while the feedback field says a spline shank, so both descriptions sit on the same listing. Reviews describe tulip and daffodil holes, a laurel hedge with the big bit, and clay for some buyers, including a fit in Bosch and Makita chucks. The same sample says the smaller bit bent, a larger shank was damaged, a battery drill made no depth, and the bit compacted soil instead of lifting it. The feedback soil note names soil and stone, which sits next to reviews that say it will not drill rock. A drill is not included.
Pros
Cons
Best for: You want three diameters for bulbs and a wider hedge hole, and you can confirm the shank is hex before you chuck it.
Less suitable: A job that needs a proven hex-only fit, or ground that already bent the smaller bit in the shared reviews.
Specifications
Common questions
Can it plant bulbs?
The title and bullets say bulb planting. Reviews describe tulips and daffodils. The same review text appears on the other Suewidfay ASIN.
Is the shank hex?
The bullets say a 3/8 in hex chuck. The feedback field says spline. Both are on the listing.
Does it include a drill?
No.
The LYFETC listing is a single 10 × 30 cm black auger at £11.99, the lowest price in this set, with a 3/8 in hex shank, a listed weight of 600 g, and manganese steel in the bullets. It shows 4.1 from 418 reviews. The bullets describe a short hollow core and cordless drills from 18 V, and they limit the soil note to loose, moist garden soils. Buyers praise a DeWalt cordless drill on hard soil, hedge planting, and some fence-post holes. Other reviews say the tip is not sharp enough for hard soil, that only about 6 inches of useful hole remained after spoil had to be cleared, and that the drill twists. One review describes an 80 cm two-piece bit that broke at a screwed joint, which does not match this 10 × 30 cm title and may come from a shared parent set. The bullets also mention pulse mode if the bit meets roots or small stones.
Pros
Cons
Best for: You want one wide, short bit for loose garden soil and you already own an 18 V cordless drill.
Less suitable: Hard stony ground, or any job that needs the 80 cm length described in a review that does not match this title.
Specifications
Common questions
Can any drill run it?
The bullets specify a 3/8 in hex and cordless drills from 18 V. They do not say every drill.
What is the working size?
The size field is 10 × 30 cm. Item weight is 600 g.
Does it include a drill?
No.
The BeneLabel bit is titled 61 × 10 cm in alloy steel at £23.99, with a listed weight of 1.42 kg and a 10 mm hex in the bullets. The listing shows 4.1 from 352 reviews. The bullets say bright orange paint and name cordless, impact, or petrol-borer drives, and they mention earth, clay, sand, and stony soil, plus bulbs, flowers, shrubs, and fence posts. Reviews praise soft soil or compost, fence stabs with a 20 V drill on clear ground, and neat holes when stones are hooked out. Critics say it burnt a drill out, was too short to use standing for a buyer just under 5 feet who wanted an extension, would not work where there are roots, struggled with larger stones, and could not get through stiff clay. A review says it stops on a rock and winds the wrist. The feedback cutting diameter says 10 mm, which conflicts with the 10 cm title, and a highlight mentions an SDS plug.
Pros
Cons
Best for: You want a long orange bit for bulbs or posts in clear, soft-to-firm ground, and you already have a powerful drill.
Less suitable: Stiff clay, roots, larger stones, or a drill that stalls as soon as the bit binds.
Specifications
Common questions
Can it plant bulbs?
The bullets say bulbs, flowers, and shrubs. Reviews also describe fence posts in clear ground.
What is it made of?
Alloy steel with a paint coating. The bullets say the paint is bright orange.
Does it include a drill?
No. You fit the hex into your own drill.
The LYFETC 10 × 40 cm bit lists a 3/8 in hex shank, manganese steel in the bullets, a black finish, and a dual-blade conical head on a hollow shaft, at £21.99 and 1.19 kg. It shows 4.1 from 228 reviews, with a first-available date of 24 April 2026. The bullets claim soil from sand through to clay and advise pulse mode, and they say the drill starts from 18 V. Reviews mention about 100 bulbs with a slipping clutch, crocuses in a lawn, thick clay for one planter, and fence-post holes if you are careful. Other buyers say the bit bent after a few holes in soft soil and twisted a wrist, that it does not fit a DeWalt SDS drill, and that an electric drill at high speed buries the bit. A 220% efficiency line on the listing is seller copy, not a test. A drill is not included.
Pros
Cons
Best for: You want a 10 cm by 40 cm hex bit for bulbs or loosening soil, and your drill has a 3/8 in chuck rather than an SDS fitting.
Less suitable: An SDS drill, high-speed running, or ground where a bit has already bent in soft soil in the reviews.
Specifications
Common questions
Does it fit every cordless drill?
The bullets say a 3/8 in hex. A review says it did not fit a DeWalt SDS drill.
What depth does the listing state?
40 cm working depth and a 10 cm diameter.
Does it include a drill?
No.
The green LYFETC bit is a single 8 × 60 cm spiral at £19.98, listed at 700 g, first available on 24 Nov. 2025. The bullets say one-piece high-carbon steel and a hex shank, while the technical table says high-speed steel, so the material claim conflicts on the same page. The hex size is not stated as 3/8 in, and the bullets mention a corded drill or an earth-auger drive rather than a voltage figure. Reviews praise planting many bulbs in clay, saplings in poor stony soil, lawn bulb holes, and fence-post holes that saved time. Critics say the head stripped on first use, the thread was damaged after a root or stone, grass wraps the flight, and one parcel looked smaller than the buyer pictured, fit only for seedling pilot holes. The listing does not say stainless. A drill is not included.
Pros
Cons
Best for: You want one long 8 cm bit for deeper planting, and you can match the hex to your chuck before you buy.
Less suitable: A lawn where grass wraps the flight, or a job that needs a confirmed 3/8 in hex and one agreed steel name.
Specifications
Common questions
How long is this auger bit?
The title and size field say 8 × 60 cm. Item weight on the listing is 700 g.
Is it stainless steel?
The listing does not say stainless. The technical table says high-speed steel, and the bullets say one-piece high-carbon steel.
Does it include a drill?
No. It is sold as the auger bit.
For this comparison we kept 11 earth auger drill bits from amazon.co.uk listings dated 19 October 2026. Scores are not a lab test. A seller line such as a named steel, a best-seller rank, or a 220% efficiency claim is not scored as a measured result. Shared star lines are not added together. Highest score is the top pick. Best price among the sets with a usable two-diameter job, after the shared star line is already deducted, is the best value.
Amazon evidence
30%Star rating on amazon.co.uk, then a deduction when the count is shared across sibling ASINs, when the UK sample in the file is tiny, or when a review describes a different bit.
Listing fit
35%A locked 3/8 in hex, a diameter and length that match bulbs or a light hole, and one size story score higher. A title that clashes with the feedback diameter, shank, or steel loses points.
Review outcome
20%Reviews that describe a finished bulb hole or a short post hole in soil score higher than a file that repeats a bent bit, a stripped head, spoil falling back, or a burnt drill.
Value
15%Shelf price in GBP against a bit a UK review can use for soil. The lowest price does not win this block when the review file may belong to another length.
Choose the diameter and length before the price. About 4 cm wide and 22–42 cm long suits bulbs. About 8–10 cm wide suits shrubs and hedge whips. A 60–80 cm title only helps if you also need depth and can control the torque. These listings specify a 3/8 in hex and suggest 18 V. An SDS chuck is the wrong tool. The K-Brands pair is the top pick for two 41 cm bits. The green WORKPRO pair is the best value when 22 cm and 30 cm fit. Shared star counts are not separate tests.
An earth auger drill bit is a steel spiral that fits a drill chuck and bores soil for bulbs, bedding plants, and light post holes. It is not a wood auger. UK buyers on amazon.co.uk are mostly home gardeners who already own a cordless drill and want to stop using a trowel for dozens of holes. Quality in this set is a locked 3/8 in hex shank, a diameter and length that match the job, and a shaft that does not rely on a joint the reviews say can snap. Sets pair a narrow bit with a wider one.
About 4 cm wide suits a bulb. About 8–10 cm wide suits a shrub or a hedge whip. A 60–80 cm title does not fix a hole that is simply too narrow, and a 30 cm bit cannot finish a 600 mm fence footing in one pass.
Suewidfay B0DJVS8F14, Insaga B0FF23XVTC, and BeneLabel B0DXJVCLCY print a title size and a different feedback figure. Do not average them. Confirm the live listing before you treat 7.5 cm or 10 cm as the cut.
Three WORKPRO ASINs share 6,370, and two Suewidfay ASINs share 194. Those lines may be parent ratings. A 220% efficiency line on one LYFETC listing is seller copy, not a measured test.
Job size comes first. About 4 cm wide and 22–42 cm long suits bulbs. About 8–10 cm wide suits shrubs and hedge whips. A 60–80 cm bit only helps if you also need depth and can control the torque. RHS depth is two to three times the bulb height, so a 5 cm bulb sits in a 10–15 cm hole. Jacksons gives about 600 mm as a starting point for a fence post. A 30 cm bit cannot deliver that in one pass. One listing should tell one size story.
Shank and drill decide whether the bit turns. Listings here specify a 3/8 in hex and suggest 18 V, sometimes with 14 V written as a minimum. An SDS-only tool is the wrong chuck. One review of the LYFETC 10 × 40 cm bit says it did not fit a DeWalt SDS drill. Confirm the live photo if feedback says straight or spline while the bullets say hex. K-Brands prints both. One Suewidfay set prints hex in the bullets and spline in the feedback field.
Three typical situations, each with a recommendation from this comparison.
You want a narrow bit for tulips and daffodils. RHS depth is two to three times the bulb height, so a 5 cm bulb sits in a 10–15 cm hole. The green WORKPRO pair, 4 × 22 cm and 8 × 30 cm at about £13.99, is the best value when that shorter length is enough.
You want two longer bits for bulbs and a small post in soil, and you will check the shank on the live listing. The K-Brands pair, 4 × 41 cm and 9 × 41 cm, is the top pick, with 4.5 from 4,267 reviews on this listing. A 30 cm bit cannot finish a 600 mm fence footing in one pass.
You want a single bit titled around 60–80 cm for deeper planting, and you can keep both hands on an 18 V drill. The Insaga bit is titled 7.5 × 81 cm with a 10 mm hex, at about £19.99. A feedback field lists a 24.89 mm cutting diameter, so confirm the cut before you rely on 7.5 cm.
The K-Brands pair is the top pick: two alloy-steel bits at 4 × 41 cm and 9 × 41 cm, 4.5 from 4,267 reviews on this listing, at about £24.99. Check the shank before you chuck it, because the bullets say 3/8 in hex and the feedback field says straight. The green WORKPRO pair is the best value at about £13.99 when 4 × 22 cm and 8 × 30 cm match the hole. Shared 6,370 and 194 star lines are not separate tests, and none of these bits replaces a 600 mm concrete footing.
K-Brands 4 × 41 cm and 9 × 41 cm
Two 41 cm bits and 4.5 from 4,267 reviews on this listing, the highest score in the set.
WORKPRO green 4 × 22 cm and 8 × 30 cm
Lowest WORKPRO price here, about £13.99, when 22 cm and 30 cm fit the hole.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources from the research digest. Last checked in October 2026.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices and review counts are from the amazon.co.uk listings in this set. This is not a lab test.
