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DEWALT Extreme 2 SDS-Plus Drill Bit Review: Can It Bore Through Tough Concrete?

DeWalt DT9578QZ 16 x 160mm Extreme 2 SDS-Plus Drill Bit
4.6
[Extended Durability]  Longer life and faster drilling with enhanced wear resistance.
[Premium Carbide Grade]  Superior carbide composition for improved hardness and longevity.
[Optimised Flute Design]  Efficient debris removal reduces clogging for smoother drilling.
[Hardened Body]  Extra strength minimizes breakage under heavy use.
[Advanced Tip Geometry]  New tip design ensures precise penetration and faster starts.
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A masonry drill bit built for heavy-duty holes, promising longer life and faster drilling with consistent results, the DEWALT Extreme 2 SDS-Plus Drill Bit targets tradespeople and keen DIYers. Gain confidence when tackling old concrete or demanding renovation tasks. But is the construction robust enough for frequent, heavy use?

⚡ At a Glance
  • Cutting Quality: Faster drilling and consistent hole quality for masonry work
  • Best for: Tradespeople and DIY enthusiasts who drill concrete and masonry regularly
  • Not ideal for: Users who need bits specifically for wood or metal work

Designed to make masonry drilling quicker with consistent results. Durable construction suits frequent use on concrete.


Faster penetration – Thanks to superior carbide grade and new tip design

Superior carbide grade increases hardness and wear resistance while the new tip geometry improves initial bite and centring for cleaner starts. User feedback highlights accurate centring and neat holes from the redesigned tip.

Quicker starts and reduced push pressure when boring into old concrete, saving time on repeated holes. Neater hole edges reduce rework during installations.

Cleaner holes, fewer interruptions – With optimised flute design

Optimised flutes channel debris away from the cutting edge, allowing continuous contact between bit and material and keeping the cutting surfaces clear. Efficient debris removal reduces the need to withdraw the bit frequently.

Sustained drilling speed on deeper holes, with less clogging and fewer stops to clear dust. Drilling sessions feel smoother and more consistent.

Greater toughness – With a hardened body for reduced breakage

A hardened body increases structural strength under torsion and impact, lowering the chance of bending or snapping during demanding use. Descriptions and reviews highlight heavy-duty construction intended to withstand trade conditions.

Improved durability cuts replacement frequency, making the bit reliable for repeated, heavy use. Tradespeople benefit from fewer interruptions and longer service life.

✨ The 4 Key Reasons for DEWALT Extreme 2 SDS-Plus Drill Bit
  1. Optimised flute design – Reduces clogging, maintains drilling speed on deep masonry holes
  2. New tip geometry – Ensures quicker bite and better hole centring on start
  3. Hardened body – Lowers breakage risk during heavy-duty, repeated use sessions
  4. Superior carbide grade – Extends service life under high torque and abrasive conditions
📋 Technical Details at a Glance
  • Brand: DEWALT
  • Model: Extreme 2
  • Bit Size: 16 x 160mm
  • Shank Type: SDS-Plus
  • Intended Application: Masonry and concrete drilling
❓ Frequently Asked Questions

Q: Is this bit suitable for drilling concrete?

A: Yes, user reviews report effortless drilling through old concrete and descriptions identify masonry as the intended application. The bit is designed for reliable performance in concrete work.

Q: What shank type does the bit use?

A: The product name confirms an SDS-Plus shank, suitable for tools with SDS-Plus chucks. That shank style supports secure fitment and efficient impact transfer.

Q: How durable is the bit for trade use?

A: Durability is emphasised through a hardened body and a superior carbide grade, and reviews praise heavy-duty construction and long life. Those features reduce breakage and replacement frequency.

🏆 Our Verdict

Ideal for tradespeople and serious DIYers who repeatedly drill into masonry and concrete. Hardened construction, improved tip geometry and efficient flute design combine to deliver faster, cleaner holes and longer service life. Durable build quality offers clear long-term value for frequent users.