Dremel 8240-5 12V Cordless Rotary Tool Kit with Variable Speed and Comfort Grip - Includes 2AH Battery Pack, Charger, 5…
Dremel
Best for
Best Dremel 4300
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 1 trusted source
Current price
$71.99
Updated May 18, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Dremel 8240-5 lands as the value pick in Dremel's cordless lineup. popularwoodworking.com describes the ergonomics as 'all around good' and the tool's design as a clear improvement over predecessors, while flagging that 'it's not a particularly pleasant-sounding tool.' r/Tools commenters compare it favorably to the brushed Milwaukee M12, with one user calling the 12V Dremel 'far superior to the M12 brushed model' at similar pricing. The Amazon signal corroborates the community view (2,100+ reviews at 4.6), and r/Dremel threads emphasize the removable battery as a meaningful upgrade over older sealed-battery Dremels — you can keep a spare charged.
What reviewers liked
- Removable 2Ah battery praised in r/Dremel for letting users keep spares charged
- r/Tools commenter rates it 'far superior' to brushed Milwaukee M12
- Variable speed precision called out as a strength versus competitors
- Strong verified-purchase signal (2.1k Amazon reviews, 4.6)
- Significantly cheaper than the brushless 8250
Where it falls short
- Brushed motor expected to have shorter life than 8250/8260 per r/Dremel
- popularwoodworking.com flagged noise as unpleasant
- Larger and thicker than older Dremel cordless models per r/MilwaukeeTool comparison
- Walmart verified-purchase reviews note frequent recharging under heavy use
Across the reviewers we read, the Dremel 8240-5 lands as the value pick in Dremel's cordless lineup. popularwoodworking.com describes the ergonomics as 'all around good' and the tool's design as a clear improvement over predecessors, while flagging that 'it's not a particularly pleasant-sounding tool.' r/Tools commenters compare it favorably to the brushed Milwaukee M12, with one user calling the 12V Dremel 'far superior to the M12 brushed model' at similar pricing.
The Amazon signal corroborates the community view (2,100+ reviews at 4.6), and r/Dremel threads emphasize the removable battery as a meaningful upgrade over older sealed-battery Dremels — you can keep a spare charged. Variable speed precision is consistently called out in r/MilwaukeeTool head-to-heads as the 8240's strongest feature versus competing cordless rotary tools.
Where reviewers push back is on the brushed motor: r/Dremel and r/Tools commenters note the 8250 and 8260 are brushless and will likely outlast the 8240 in heavy use. If you're a frequent user, the upgrade is worth considering; for occasional DIY, the 8240 is the value play.
- Compact, Portable, & Powerful
- 12 Volt / 2 AH Lithium-Ion battery provides maximum performance, high power, and runtime at all speeds (5,000-35,000 RPM).
- Innovative Tool Design
- Sleek & ergonomic design with 360-degree grip zone maximizes comfort and control allowing continuous performance for extended working sessions.
- Versatility
- Able to perform the widest range of applications, including but not limited to cutting, sanding & grinding / sharpening. Fully compatible with all Dremel Accessories & Attachments.
- Quick Accessory Changes
- Patented EZ Twist Nose Cap makes accessory changes fast and easy without the need of a wrench.
- Maximum Run Time
- Advanced technology for optimum battery life and power.
- Led Battery Life Indicator
- Indicates remaining battery life before a recharge is needed.
- Noise Control
- Ventilation openings for smooth, cool and quiet operation
- Kit Contents
- Dremel 12V 8240 Cordless Rotary Tool and Rotary Accessories (x5).
The Dremel has better precision when adjusting speed/RPM. The motor is brushless so it will undoubtedly last longer. The Dremel is very large, much thicker ...
Albeit, the thing worked, and for years. The newer 8240 seems to have a much bigger, removable, battery. This means I could have a back up ...
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