DEWALT 20V MAX Brushless 1/4 in Cordless Impact Driver Kit (DCF840D1) – 1,700 in-lbs Torque, 3,200 RPM, 3-LED Work Light

DEWALT 20V MAX Brushless 1/4 in Cordless Impact Driver Kit (DCF840D1) – 1,700 in-lbs Torque, 3,200 RPM, 3-LED Work Light

|21 ratings

Key item features

  • Brushless motor performance – delivers up to 1,700 in-lbs of torque and 3,200 RPM
  • Compact, lightweight design – improved access and reduced user fatigue
  • Variable-speed trigger – precise control for fastening applications
  • 3-LED work light – enhanced visibility in low-light areas
  • 1/4 in hex chuck – quick bit changes and secure bit retention
  • Cordless convenience – powered by the DEWALT 20V MAX system
  • Ready-to-use kit – includes battery and charger
  • Ideal for pros and DIY users – framing, decking, cabinetry, and general fastening

Specs

Torque, 1700 in lbElectric motor type, BrushlessBattery capacity, 2 Amp HoursVolts, 20 VMaximum speed, 3200 rpmFeatures, Variable Speed, Built In Led, Brushless Motor, Battery Powered, Includes Storage Bag

About this item

Product details

Drive large fasteners efficiently with the DEWALT DCF840D1 20V MAX Brushless 1/4 in Cordless Impact Driver Kit. Designed for professional contractors, installers, and advanced DIY users, this impact driver delivers strong torque, compact handling, and precise control for everyday fastening tasks on the jobsite or at home. The high-performance brushless motor delivers up to 1,700 in-lbs of torque and speeds up to 3,200 RPM, providing the power needed to drive large-diameter screws quickly and consistently. Its compact, lightweight design improves ergonomics and makes it easier to access tight or hard-to-reach spaces such as cabinets, framing bays, and overhead installations. A variable-speed trigger allows users to control fastening speed with precision, helping prevent stripping and improving accuracy across a wide range of applications. For improved visibility, the impact driver features an integrated 3-LED work light that illuminates dimly lit workspaces and reduces shadows around the fastener. This kit includes a 20V MAX battery and charger, providing a ready-to-use solution that integrates seamlessly into the DEWALT 20V MAX cordless system.
  • Brushless motor performance – delivers up to 1,700 in-lbs of torque and 3,200 RPM
  • Compact, lightweight design – improved access and reduced user fatigue
  • Variable-speed trigger – precise control for fastening applications
  • 3-LED work light – enhanced visibility in low-light areas
  • 1/4 in hex chuck – quick bit changes and secure bit retention
  • Cordless convenience – powered by the DEWALT 20V MAX system
  • Ready-to-use kit – includes battery and charger
  • Ideal for pros and DIY users – framing, decking, cabinetry, and general fastening
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.  

Specifications

Torque

1700 in lb

Electric motor type

Brushless

Battery capacity

2 Amp Hours

Volts

20 V

Warranty

Warranty information

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars
21 ratings18 reviews
Includes global ratings and reviews
How item rating is calculated
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 18 reviews

Mar 2, 2026
Reviewer name: Genel02
5 out of 5 stars
5 out of 5 stars review

Great Impact

Bought this last year, for use at home and side job works great never let me down!

Review from dewalt.com
Helpful?679QMBADJA9T5387422428
Jan 8, 2026
Reviewer name: JB2414
5 out of 5 stars
5 out of 5 stars review

Must have

Automotive Technician here. Have one of these i use on almost everything. Tons of power. Had to buy snap on 3/8 drive bit for it because it snaps them periodically and snap on warranties them.

Review from dewalt.com
Helpful?679QMBADJA9T5387422428
Dec 25, 2025
Reviewer name: Cstru
5 out of 5 stars
5 out of 5 stars review

Christmas

Just opened. Excited to use this weekend. Just another DeWalt 20V tool to add to the others. I've been very happy with all my other DeWalt 20V tools, driver, power ratchet.

Review from dewalt.com
Helpful?679QMBADJA9T5387422428
Current price is $119.99
Price when purchased online
  • Free shipping
  • Free 90-day returns
Walmart Protection Plan by Allstate

(Only one option can be selected at a time)

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Mon, Nov 16
.
Order within 7 hr 25 min
Fulfilled by Walmart
5 out of 5 stars
5 stars out of 5, based on 3 seller reviews(5.0)
Free 90-day returns

More seller options (3)

Starting from $119.99
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.