DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver – Tool Only

The DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver is engineered for professionals who need torque and speed in a compact footprint. Measuring under 4 inches in length, this ultra-compact impact driver fits where standard tools can’t—making it ideal for cabinetry, framing, mechanical installs, or anywhere space is limited. Despite its size, the brushless motor delivers up to 1,825 in-lbs of torque, driving large fasteners with ease.

With a 3-speed control switch, you can adapt output to the task—whether you’re working with delicate hardware or driving lag screws into structural material. It runs at speeds up to 3,250 RPM and delivers up to 3,800 impacts per minute, offering the versatility needed for fast-paced jobsite work. An integrated 3-LED work light enhances visibility in dark corners, while the tool’s well-balanced, lightweight design reduces user fatigue during all-day use. This model is part of DEWALT’s 20V MAX cordless platform.

Note: Battery and charger are sold separately.

DEWALT ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver At a Glance

• Ultra-Compact Design (< 4″ Length): Accesses confined spaces that standard drivers can’t reach.
• High Torque Output (1,825 in-lbs): Handles heavy-duty fastening tasks, from structural screws to anchors.
• 3-Speed Control: Optimizes precision, speed, and power for a wide range of fastening jobs.
• Brushless Motor: Increases efficiency, extends runtime, and reduces wear for long-term reliability.
• Integrated 3-LED Work Light: Improves visibility when working inside cabinets, attics, or dark corners.
• 1/4″ Quick-Change Hex Chuck: Enables fast bit changes and supports a variety of driver bits.
• Lightweight and Balanced: Reduces operator fatigue for overhead or extended use.
• Cordless Convenience: Runs on DEWALT 20V MAX* Lithium-Ion batteries (sold separately).

Markets

• Framing & General Construction – Ideal for structural fasteners in narrow wall cavities or floor systems.
• Cabinetmaking & Millwork – Compact enough for tight corners, yet powerful for drawer slides and hardware.
• Electrical Installation – Installs junction boxes, conduit clips, and hangers in overhead or wall-mounted locations.
• Drywall Contractors – Fastens sheets with speed and control, especially in awkward spaces.
• Deck Builders – Drives long decking screws flush into hardwood and composite surfaces with ease.
• Plumbing & Mechanical Trades – Provides access and torque for securing brackets and hangers behind fixtures.
• Property Maintenance Teams – Great all-around tool for quick installs, repairs, or punch list work.

This impact driver is ideal for professionals in framing, cabinetry, electrical installation, and plumbing who require a tool that can handle heavy-duty tasks in confined spaces. Its compact design allows for easy maneuverability, while the high torque and speed ensure that even the toughest screws are driven quickly and efficiently. The 3-speed settings allow for precise control, making it a versatile tool for a wide range of applications, from decking to drywall installation. With DEWALT’s reliable brushless motor and convenient on-board lighting, the DCF850B Atomic Impact Driver keeps you working efficiently in any environment.

DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver – Tool Only Features

• MANEUVER WITH EASE: Compact, under 4 in. design for optimized ergonomics and access to difficult-to-reach spots
• HIGH-PERFORMANCE BRUSHLESS MOTOR delivers 1,825 in-lb of torque and 3,250 rpm to drive large-diameter screws
• PRO-LEVEL CONTROL and precision with a variable 3-speed trigger
• BRIGHTEN DARK WORK AREAS: Integrated 3-LED work light enhances visibility in dimly lit spaces

DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver Applications

• Framing
• Decking
• Cabinetry
• Electrical
• Dry-Wall
• Plumbing/Mechanical

DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver Includes

• Battery and Charger Sold Separately
• (1) Tool
• (1) Belt Hook

DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver Specifications

• Model: DCF850B
• Drive Size: 1/4″ Hex
• Max Torque: 1,825 in-lbs
• No Load Speed: 0–3,250 RPM
• Impact Rate: 0–3,800 IPM
• Speed Settings: 3
• Motor Type: Brushless
• Length: < 4″
• Weight: Lightweight (battery not included)
• LED Light: Yes – 3 LEDs
• Battery Platform: 20V MAX* Li-Ion (Battery and charger sold separately)
• Warranty: DEWALT 3-Year Limited / 1-Year Free Service / 90-Day Money-Back Guarantee

DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver Warranty

• Dewalts Guaranteed Tough 3/1/90 Limited Warranty

Why Professionals Prefer the Tool Only DEWALT ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver

The DEWALT DCF850B ATOMIC 20V MAX 1/4″ Brushless 3-Speed Impact Driver combines power and portability, making it a go-to tool for professionals working in construction, cabinetry, and installation projects. Its compact size, high torque, and LED work light make it especially useful for working in tight or dimly lit environments, while the 3-speed settings ensure the right amount of control for various tasks. Whether you’re working on framing, installing cabinets, or driving screws into decking, this impact driver provides the performance and reliability needed to get the job done efficiently. Often referred to as the DEWALT Atomic Impact Driver, the DCF850B is recognized for its power-to-size ratio, making it a smart choice for tight workspace professionals who can’t afford to compromise on performance. Whether you’re building frames, installing cabinetry, or driving deck screws, this driver provides the speed, control, and torque to get the job done—fast and clean. It’s a compact powerhouse trusted on jobsites that demand both reach and results