DEWALT DCF850B Atomic 20V Max 3-Speed Impact Driver
- 1825 inch pounds torque
- 3250 RPM, 3 speeds
- 20 volts, brushless
- 1/4 inch drive
- 300 watts maximum power
- Tool only, belt hook included
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact brushless three-speed impact driver sold as tool only with a belt hook. Some listing entries conflict, including the torque and chuck size lines.
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ASIN: B09KVLY25QModel: DCF850BCategory: Impact Drivers & Wrenches
Overview
DEWALT lists this ATOMIC brushless impact driver as a bare tool with a belt hook, using a quarter inch hex drive and three speed settings. The body is a metal and plastic blend, and the color is yellow.
The reason to buy is a compact driver with variable speeds that works with existing DEWALT batteries. The limitation is the data conflicts, since two torque figures and an odd chuck entry appear.
Who it's for
A trades user or serious DIYer driving screws and bolts who owns compatible batteries. A first-time buyer needs a kit with a battery, or must budget separately.
Pros and cons
- Three speed settings
- Belt hook included
- Battery not included
- Torque entries conflict
- Chuck size entry looks wrong
Performance notes
Rapid rotational impacts add torque as resistance rises, so screws seat without much wrist strain. The speed setting trades control for pace, and the battery used limits how long full output lasts.
Specifications
| Brand | DeWALT |
|---|---|
| Model | DCF850B |
| Dimensions & fit | |
| Item Dimensions L X W X H | 3 x 3 x 8 inches |
| Maximum Chuck Size | 4 Inches |
| Capacity & performance | |
| Maximum Rotational Speed | 3250 RPMhigher than 57% of 36 impact drivers & wrenches |
| Drilling Capacity Wood | 0.25 inches |
| Drilling Capacity Metal | 0.25 inches |
| Number Of Speeds | 3 |
| Battery Capacity | 5 Amp Hours |
| Power & efficiency | |
| Voltage | 20 voltshigher than 54% of 135 impact drivers & wrenches |
| Maximum Power | 300 watts |
| Battery Type | Lithium-ion |
| Power Source | Battery Powered |
| Construction & materials | |
| Color | Yellow |
| Material Type | Blend |
| Included components | |
| Included Components | Tool, belt hook |
| Other details | |
| Torque | 1825 inch pounds |
| Drill Type | Impact driver |
| Additional Features | Variable Speed |
| Is Electric | Yes |
| Maximum Torque | 18 Inch Pounds |
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%)
RYOBI ONE+ HP PBLID02B 18V Brushless Impact Driver- Maximum Rotational Speed 3250 vs 2900 RPM (+12%)
- Voltage 20 vs 18 volts (+11%)
Frequently asked questions
How do I care for the DEWALT DCF850B?
The listing gives no care instructions. It is sold as tool only with a belt hook.
Does the DEWALT DCF850B include a battery?
No. The item name says tool only.
What size drive does the DEWALT DCF850B use?
The item name says 1/4 in. The chuck size entry reads 4 inches, which looks like an error.