Tech & Gadgets · Head-to-head

DEWALT DCF850B ATOMIC 20V MAX 1/4 in. 3-Speed Brushless Impact Driver vs Milwaukee 2953-20 M18 FUEL 1/4 in. Hex Impact Driver

Which should you buy? Our verdict on both, pulled from our full The Best Impact Drivers: 4 Compared (and One to Skip) comparison.

The DEWALT wins on the specification that is both comparable and consequential, a head under four inches, without giving up meaningful torque. The Milwaukee takes the raw output crown at 2,000 in-lb if head length is not your constraint.

DEWALT DCF850B ATOMIC 20V MAX 1/4 in. 3-Speed Brushless Impact Driver

DEWALT DCF850B ATOMIC 20V MAX 1/4 in. 3-Speed Brushless Impact Driver

Buy it

Nearly the torque of the biggest tool here in a head under four inches, which is the spec that decides whether the driver fits the job at all.

  • DEWALT publishes a head length of less than 4 in. front to back, the shortest here, which is what gets the tool between studs and inside cabinets.
  • 1,825 in-lb of published max torque, within striking distance of the Milwaukee's 2,000 in a much smaller tool.
  • Three speed settings, so the tool can be dialled down for small fasteners rather than driven flat out.
  • 3 year limited warranty with 1 year free service and a 90 day satisfaction guarantee, the strongest cover in this group.
  • DEWALT describes the figure only as MAX torque and does not say whether it is fastening or breakaway, nor name any measurement standard.
  • Impacts per minute are not published on the product page, so one of the two figures that determines driving speed is missing.
  • Weight is not published there either, which makes an all-in comparison against the others awkward.
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Milwaukee 2953-20 M18 FUEL 1/4 in. Hex Impact Driver

Milwaukee 2953-20 M18 FUEL 1/4 in. Hex Impact Driver

Buy it

The highest published torque here at 2,000 in-lb, backed by the fastest impact rate, in a head you pay for in inches.

  • 2,000 in-lb of published torque, the most in this comparison.
  • 4,400 impacts per minute, the highest impact rate here, which is what actually drives a long fastener quickly.
  • A 1,700 to 3,900 RPM range, giving genuine control at the low end rather than an on-or-off trigger.
  • Milwaukee publishes head length at 4.47 in. and weight at 2.2 lb, so the size trade is stated rather than left for you to discover.
  • At 4.47 in. it is nearly half an inch longer than the DEWALT, which is decisive in a stud bay.
  • The 2,000 in-lb figure is quoted as nut-busting torque in Milwaukee's marketing, meaning loosening rather than fastening, so it is not the force you will drive with.
  • No measurement standard is named, because none exists for this category.
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Side by side

DEWALT DCF850B ATOMIC 20V MAX 1/4 in. 3-Speed Brushless Impact DriverMilwaukee 2953-20 M18 FUEL 1/4 in. Hex Impact Driver
Our verdictBuyBuy
Best forAnyone working in tight bays, cabinets or between joists, where head length decides the job before torque does.Heavy fastening and removal work where output and impact rate matter more than getting into tight spaces.
Price tier$$ · mid-range$$$ · premium

The bottom line

Our overall pick is the DEWALT DCF850B ATOMIC 20V MAX 1/4 in. 3-Speed Brushless Impact Driver - Nearly the torque of the biggest tool here in a head under four inches, which is the spec that decides whether the driver fits the job at all. Choose the Milwaukee 2953-20 M18 FUEL 1/4 in. Hex Impact Driver instead if heavy fastening and removal work where output and impact rate matter more than getting into tight spaces.

Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best Impact Drivers: 4 Compared (and One to Skip).