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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
A stump is stubborn enough without a drill bit that gives up halfway through. You need a bit with a self-feeding tip that yanks itself into the wood, wide flutes (the spiral grooves that eject sawdust) that prevent clogging, and hardened steel that survives hidden rocks and nails. This guide lines up the six best drill bit for tree stumps, ranked by real owner feedback and the specs that actually matter when you are leaning into a high-torque drill for an hour straight.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Whether you are drilling deep holes for stump-removal chemicals or boring through a root ball to clear land, the right auger bit makes the difference between a steady dig and a stalled drill. Here is everything you need to pick your next drill bit for tree stumps.
Our Picks at a Glance
How To Choose The Best Drill Bit for Tree Stumps
A tree-trunk drill bit lives a hard life: constant torque, packed sawdust, and the occasional hidden nail. Here are the three specs that separate a one-season bit from a long-term workhorse.
Cutting Diameter
Stump removal with chemicals usually calls for holes around 1 inch wide — big enough to pour in the treatment but small enough to drill many of them quickly. A 3/4-inch bit chews through wood faster on a smaller drill, while a 1-1/2 inch version removes more material per pass if you are clearing roots or running larger lag bolts. Match the diameter to your drill’s power: a wider bit demands more torque.
Flute Count and Design
The flutes (the spiral grooves that carry sawdust out of the hole) determine how fast the bit clogs. A 2-flute design clears chips well for standard wood boring. A tri-flute (3-flute) bit has an extra channel, so it moves more debris per rotation — useful when you are drilling deep into green, wet stump wood that wants to pack into the spiral. Wide, deep flutes also help the bit run cooler.
Shank Type and Length
The shank is the part your drill chuck grabs. A hex shank grips tighter under high torque than a round shank — it resists slipping when the bit catches. Length matters too: you need a bit long enough to drill past the bark and into the stump’s heartwood, usually 17 to 24 inches. A longer bit also lets you drill through thick timber in one pass rather than stopping to reposition.
Quick Comparison
| Model | Best For | Cutting Diameter | Flutes | Length | Amazon |
|---|---|---|---|---|---|
| DEWALT DW1687★ Best Overall | All-around stump drilling | 1 in | 3 | 17 in | Amazon |
| Makita D-35938Top Performer | Extra-long reach | 25.4 mm (1 in) | 2 | 18 in | Amazon |
| WOBLLMX Tri-Flute | Speed through deep holes | 19.05 mm (3/4 in) | 3 | 24 in | Amazon |
| Diablo DAG3110 | Nail-embedded wood | 1 in | — | 17-1/2 in | Amazon |
| GRIXLEN 1-1/2 in | Oversized holes | 38 mm (1-1/2 in) | 2 | 18 in | Amazon |
| waltyotur Earth Auger | Root clearing in soil | 4 in | 2 | 31 in | Amazon |
In‑Depth Reviews
1. DEWALT Drill Bit, Ship Auger, 1 Inch x 17 Inch (DW1687)
Our pick — over 4.5★ from 500+ verified ratings; the strongest balance of quality and price.
The crowd-favorite 1-inch auger that chewed 40 holes into a stump-and-clay mix before it even started to dull.
You feel the self-feed spur bite and pull the bit in — no forcing, just steady torque. The 1-inch diameter and 17-inch length hit the balance for stump-chemical holes: wide enough to pour in the treatment, long enough to reach deep heartwood. The hardened alloy steel and the tri-flute design (three spiral grooves that carry sawdust) mean chips ride out fast instead of packing into the hole. Buyers report drilling a 5 to 9 foot wide stump without the bit backing off. The 7/16-inch ball-groove shank locks into most drill chucks without slipping.
Here is where it gets real: the self-feeding tip works so aggressively that you need a powerful corded drill with a second handle to control it while reversing briefly to back the bit out. Owners mention the threaded tip does pull the bit in fast — one owner drilled 40 holes through stump and clay before the edge dulled, then sharpened it with a file and kept going. After roughly 85 to 90 holes, the screw tip did break off from dullness and insufficient pressure, but that is an extreme workload for any mid-range auger. The mixed sharpness feedback from some owners usually traces to hitting rocks or gravel.
The thing everyone raves about is the raw hole-drilling speed — it is noticeably faster than a paddle bit, and the steel holds up against embedded nails. Buyers call it surprisingly fast.
What wins owners over
- Self-feeding spur pulls the bit into the wood so you barely push.
- Survived 40 holes through stump and clay before needing a file touch-up.
- Tri-flute design clears debris faster than standard 2-flute bits.
The honest trade-offs
- Demands a powerful corded drill with a side handle for safe control.
- Must reverse the drill briefly to remove the bit from deep holes.
- The threaded screw tip can break after very heavy use (85+ holes) if the bit is dull.
Reach for this if: You want a proven 1-inch auger that thousands of owners trust for stump-chemical holes, with a self-feeding tip that does the hard work for you.
Think twice if: You only have a small cordless drill — this bit needs a tool with real torque and a second handle to stay safe at full bore.
2. Makita D-35938 1″ X 18″ Ship Auger Bit
The 18-inch bit that bored 12 holes through a Madrone stump and came out still ready for more.
Makita’s ship auger uses a screw point that pulls the 1-inch wide bit through the material fast, while the wide flutes (the spiral channels that eject sawdust) push the waste out instead of letting it bind. The hex shank gives your chuck a firmer bite than a round shank when the torque climbs. One owner ran this bit through 14-inch deep holes in a large Madrone stump using a DeWalt DCF899 impact wrench with an adapter, and reported the bit held up “really nicely.” Another uses it to bore through 16-inch oak logs for firepit logs and says it cuts great even at that depth. The hardened steel is also designed to chew through nails you missed in the wood. At 18 inches, it reaches deeper than the DEWALT while keeping the same 1-inch cutting width.
A small number of owners have noted a wobble that made their holes slightly elongated rather than perfectly round, a sign that a few units may have centering inconsistencies. Most buyers, though, call the cutting performance excellent and the quality solid for the price. The bit is slightly longer than the DEWALT — 20.87 x 1.38 x 1.38 inches in packaging versus the DEWALT’s 18.25 x 1.75 x 1.75 inches — which gives you an extra inch of reach for those deep stump cores.
“This would be the only bit I would need if I could just quit hitting the nails,” sums up the owner consensus — it handles accidental nail strikes without a complaint.
Where it leads: The 18-inch length and sharp screw-point give you a longer reach and a clean self-feed action that makes drilling deep stump holes feel almost easy. The edge thickness lets it shrug off embedded nails better than most general-purpose bits.
The note of caution: A very small batch of units arrived with a slight wobble that made holes less precise — if perfect roundness matters, inspect the bit on arrival. Most owners have zero complaints.
Best for: Firewood borers and stump removers who need that extra inch of reach and a bit that survives nail strikes without chipping. A 10-amp corded drill is recommended to get the most out of it.
skip it if: You prioritize a tri-flute design for jam-free chip clearing — this is a 2-flute bit that works best with a powerful drill that keeps the spiral moving.
3. 3/4″ x 24″ Auger Drill Bit for Wood, Hex Shank Tri Flute (WOBLLMX)
The 24-inch tri-flute that went through trees with no problems and costs less than a round of fuel for the chainsaw.
This bit is narrower at 3/4 inch (19.05 millimeters) but makes up for it with length — 24 inches total, which is the longest dedicated wood auger in this lineup. The tri-flute design (three spiral grooves with hollow centers) is precision-milled to move sawdust faster than a standard 2-flute bit, a real advantage when you are drilling into green, resinous stump wood that tends to gum up the channels. The self-positioning point tip keeps the bit from walking across the surface on startup. One owner used it to drill rebar holes in 6 x 6s and called it “easy,” while another building a tree house went through multiple trees without any hesitation. The bit comes in a reusable PVC tube for storage.
Quality and sharpness are the most-praised aspects, but the hole precision and long-term durability get mixed feedback — some owners find the high-carbon steel holds up well, while others wish the edge stayed sharper longer through very dense hardwood. The length lets you drill through thick landscape timber in a single pass, which saves time on fence-post or tree-house projects. The hex shank is 3/8 inch, so it fits standard drill chucks without an adapter.
The standout feature: At 24 inches, this is your go-to for deep-bore applications where shorter bits force you to stop and reposition — one steady push and you are through. The triple cutting spurs help the bit center itself on the first contact.
The realistic trade-off: The 3/4-inch diameter removes less material per hole than the 1-inch bits above, so you will need more holes for chemical stump treatment. Durability is good but not industrial — hammer it into knotty wood daily and it will eventually need a sharpen.
Reach for this if: You need the longest drill bit for tree stumps in this list for deep, one-pass holes and want a tri-flute that clears chips fast. It is a top value pick for occasional stump work and tree-house builds.
Think twice if: You need a 1-inch hole for chemical application or you regularly drill into nail-embedded demolition wood — the high-carbon steel here is strong but the DEWALT or Diablo handle nails better.
4. Diablo Auger Bit for Wood & Nail-Embedded Wood – 1″ Dia, 17-1/2″ (DAG3110)
The bit that eats through tough old wood like butter and lasts six months daily on power poles.
Diablo’s Dura-Tip technology is the headline here — a dual-cutting-edge tip designed specifically for nail-embedded wood. The two-step cutting action starts the hole cleanly, and the deep flutes (the spiral channels that clear chips) tune chip evacuation so your drill uses less energy per hole. One owner drilling through 18-inch diameter yellow pine power poles daily reported the Diablo lasted 5 to 6 months while other brands gave out in 1 to 2 months. Another buyer called it a “standout” for drilling through multiple studs and beams during construction. The 7/16-inch hex shank adds stability in both cordless and corded tools. The bit is 17-1/2 inches long with a 13-1/2 inch working length, the same practical reach as the DEWALT but with a more aggressive tip geometry.
The durability feedback is mixed because some owners did break the tip, usually in very demanding applications or when the bit was pushed sideways. But when it works — and it works for most — the cutting speed through tough old wood is exceptional. A buyer drilling full-length holes against the grain in 4×4 cedar posts said the bit “hasn’t flinched” and cuts great after a lot of work. The brushed finish reduces friction. You really do need a corded drill with a side handle to run this at its best; a small cordless drill stalls around 6 inches into walnut.
What makes it a beast
- Dura-Tip technology survives nail strikes that would chip standard steel.
- Dual cutting edges bore through yellow pine utility poles for months without replacement.
- Deep flutes keep chips flowing so you drill more holes per battery charge.
What to know before you buy
- The tip can break under extreme side-loading — let the bit do the work, do not lever it.
- Needs a high-torque corded drill; cordless models struggle past 6 inches in dense wood.
- Costs a little more upfront than the DEWALT, but the longevity saves money over time on heavy jobs.
Best for: Heavy users who drill into nail-embedded wood daily — contractors, fence builders, and anyone removing old-growth stumps with hidden hardware. The tip technology is the real differentiator here.
Not ideal for: Light or occasional use where a standard hardened-steel bit like the DEWALT gives you the same 1-inch cut at a lower cost.
5. GRIXLEN 1-1/2 x 18 inch Auger Drill Bit for Wood
The 1-1/2 inch monster that maple tappers love for drilling deep syrup taps in a single pass.
At 38 millimeters (1-1/2 inches), this is the widest dedicated wood auger in the lineup — it removes at 1-1/2 inches versus a 1-inch bit per rotation. The black oxide finish reduces friction and resists corrosion. The 1/2-inch hex shank is built for high-torque drills and impact drivers. Owners use it for everything from tapping maple trees during syrup season to pre-drilling for 10-inch 3/8-inch galvanized lag screws on H-post installations. The sharpness is consistently praised, and the stainless steel construction resists rust better than plain high-carbon bits. One owner drilling 4 holes through 4 inches of wood said the bit was sharp enough that it “didnt take me long” to finish each hole. Another uses it for GopherHawk traps — finding the hollow spot underground and dropping the trap in place.
There is one sizing quirk: a few owners noted the bit ran about 0.5 millimeters smaller than the stated 1-1/2 inch, so if you need an exact fit for a bolt or pipe, measure before you drill. The durability gets mixed feedback — some say it holds up well through repeated use, while others wished it lasted longer in very dense hardwood. Still, for the price, the combination of width and length is tough to top for oversized holes in timber.
Why you would choose this: You need a 1-1/2 inch hole through thick wood or stumps for large bolts, root removal, or syrup tapping, and you want a bit that is sharp out of the package and resists rust.
The honest caveat: Sizing can vary slightly from the stated diameter — measure for precision work. The steel is sharp but not indestructible; avoid hammering it through knot-heavy wood.
Reach for this if: You need the widest auger here for big-diameter holes and you value the black-oxide corrosion resistance for outdoor maple-sap or fence work.
Think twice if: Your drill is on the weaker side — a 1-1/2 inch bit in dense hardwood demands serious torque; a 1-inch bit like the DEWALT or Diablo is more manageable.
6. waltyotur Auger Drill Bit Earth Bit 4 x 31 inch Garden Spiral
The 4-inch earth auger that tears through roots and soil before you break out the big machinery.
This is a completely different animal from the wood augers above — a 4-inch diameter earth bit built from heavy-wall carbon steel tubing with a powder-coated finish. It is 31 inches long with a 3/4-inch round drive shaft, designed for soil, not lumber. One owner with a 72cc auger machine uses a strategy: first this 4-inch bit to break up the roots, then an 8 to 12-inch auger to finish the hole. It handles small and large roots without bogging. Another drilled about 90 holes down to the powerhead and said it was “still going strong.” The tapered point starts the hole cleanly in dirt. The universal 3/4-inch round shank fits standard one-person and two-person auger machines.
A handful of owners had trouble — one reported the bit was wobbly even with an adapter and would not dig, which can happen if the round shank does not seat perfectly in a worn chuck. Most buyers, though, find it extra-heavy duty and effective: with a powerful drill, you want to hold on tight and let the bit do the work without pushing too hard. Moving your hands in a spiraling motion as you drill helps the bit self-feed into the ground. It is not designed for tree-stump wood, but for clearing the soil and roots around the stump base before you attack the wood with a regular auger.
The root-clearing advantage
- 4-inch wide barrel removes soil and roots fast — one owner drilled 90 holes with no wear.
- Heavy-wall carbon steel tubing withstands the torque of a 72cc auger machine.
- Powder-coated finish resists rust from wet soil better than bare steel.
The setup reality
- Requires a powerful drill or dedicated auger machine; ordinary cordless drills may lack the torque.
- The round shank can wobble in some chucks if not seated perfectly — check fit before tough jobs.
- This is a soil/root bit, not a wood boring bit; it complements but does not replace a 1-inch wood auger for stump chemical holes.
Best for: Ground prep around stumps — clearing the surrounding soil and roots so you can access the wood. Also a strong choice for planting trees or shrubs, fence posts, and flag holes.
Not right for: Drilling into the stump wood itself — for that, you want one of the 1-inch wood augers above (the DEWALT or Diablo) that have a self-feeding screw tip for timber.
Understanding the Specs
Cutting Diameter and Material Removal
A 1-inch bit removes enough wood for stump chemicals to penetrate deep, while a 3/4-inch bit is faster on a smaller drill but needs more holes. A 1-1/2 inch removes more material per pass but demands serious torque. The wider the bit, the more your drill works — match the diameter to your tool’s power rating. In stump work, the goal is usually a grid of deep holes so the treatment soaks into the heartwood evenly.
Flute Count: 2 vs. 3
The flutes are the spiral grooves that carry sawdust out of the hole. A 2-flute auger is standard and works well when your drill is powerful enough to keep the chips moving. A tri-flute (3-flute) design has an extra channel, so it clears more debris per turn — helpful in green, wet stump wood that wants to pack tight. More flutes also mean the bit is slightly less aggressive per flute, which can reduce the chance of binding in gnarly knots.
FAQ
Can you use a regular wood drill bit on a tree stump?
How many holes should I drill in a tree stump for chemical removal?
What size drill bit is best for tree stump removal?
Will a cordless drill handle a stump auger bit?
How do you keep an auger bit from binding in wet stump wood?
What is a self-feed spur on a stump drill bit?
Can a stump auger bit drill through nails?
Is a hex shank or round shank better for stump drilling?
Final Thoughts: The Verdict
If you want one dependable pick, the drill bit for tree stumps winner is the DEWALT DW1687 because it pairs a self-feeding tip with a tri-flute design and proven steel that owners push to 40 holes and beyond. If you regularly drill into nail-embedded demolition wood, grab the Diablo DAG3110 — its Dura-Tip technology keeps cutting through staples and small metal long after standard bits give out. And for the longest reach in a one-pass auger, the WOBLLMX Tri-Flute 24-inch is the one to reach for when you need to drill deep into thick landscape timber without stopping to reposition.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gardening Beyond earns from qualifying purchases. This does not affect which products we feature.