DEWALT DCF845B 20V Max XR 1/4 in Impact Driver
- 20 volts, DEWALT 20V MAX batteries
- 1825 inch pounds of maximum torque
- 3400 RPM top speed across 3 speeds
- 0.5 inch maximum chuck size
- 300 watts maximum power
- Tool only, no battery included
- 1 kilogram weight
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A variable speed impact driver with a high torque rating, sold as a bare tool for owners of the matching battery line. A battery and charger are a separate need.
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ASIN: B0BQCWH5KFModel: DCF845BCategory: Impact Drivers & Wrenches
Overview
A variable speed impact mechanism drives fasteners in this DEWALT tool, which is supplied as a tool only unit for the matching battery system. The housing is metal with some secondary plastic parts.
Three speed settings and a high torque rating cover everything from small screws to larger fasteners. The limitation is the bare tool format, which leaves the battery and charger to a separate purchase.
Who it's for
Anyone with a shelf of compatible batteries gets a capable driver without a second pack. Someone starting from nothing should look at a kit, because nothing here powers or charges the tool.
Pros and cons
- Three speed settings
- High listed torque
- Variable speed control
- Bare tool for battery owners
- Battery and charger sold separately
- Chuck style not described
- Warranty wording is generic
Performance notes
Torque and speed come from the motor and the impact mechanism, and the three speed settings let the user match the fastener. Drilling capacity is listed for wood and metal, which marks the upper limit for hole size. Run time depends on the battery chosen.
Specifications
| Brand | DeWALT |
|---|---|
| Model | DCF845B |
| Dimensions & fit | |
| Maximum Chuck Size | 0.5 Inches |
| Item Dimensions L X W X H | 5.1"L x 3.38"W x 8.07"H |
| Item weight | 1 Kilograms |
| Capacity & performance | |
| Maximum Rotational Speed | 3400 RPMhigher than 66% of 36 impact drivers & wrenches |
| Drilling Capacity Wood | 0.25 Inches |
| Drilling Capacity Metal | 0.5 Inches |
| Number Of Speeds | 3 |
| Power & efficiency | |
| Power Source | Battery Powered |
| Voltage | 20 Voltshigher than 54% of 135 impact drivers & wrenches |
| Maximum Power | 300 Watts |
| Construction & materials | |
| Material Type | Metal with possibly some secondary plastic parts |
| Color | Black, yellow |
| Compatibility & installation | |
| Compatible Devices | DEWALT 20V MAX batteries (not including the tool itself) |
| Included components | |
| Included Components | Impat Driver Tool Only |
| Unit Count | 1.0 Count |
| Warranty & support | |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Other details | |
| Maximum Torque | 1825 Inch Pounds |
| Drill Type | Impact Driver |
| Additional Features | Variable Speed |
| Is Electric | Yes |
Closest rivals on specs
RYOBI PCL235B ONE+ 18V 1/4 in Impact Driver- Voltage 20 vs 18 volts (+11%)
Milwaukee 2853-20 M18 Fuel Hex Impact Driver- Voltage 20 vs 18 volts (+11%)
Milwaukee 2953-20 M18 Fuel 1/4 in Hex Impact Driver- Voltage 20 vs 18 volts (+11%)
- Maximum Rotational Speed 3400 vs 3900 RPM (-13%)
Frequently asked questions
How big is the DEWALT DCF845B?
The listing gives 5.1 inches long, 3.38 inches wide and 8.07 inches high. That is without a battery attached.
Does the DEWALT DCF845B come with a battery?
No. The included component reads tool only, and the compatible devices are DEWALT 20V MAX batteries.
Is the DEWALT DCF845B a drill?
The drill type is listed as impact driver, so it is built for fastening rather than precision drilling.
Can I adjust the speed on the DEWALT DCF845B?
The listing names variable speed and three speed settings but does not describe the selector.