DEWALT DCF900B 20V Max 1/2 in High Torque Impact Wrench
- 1400 foot pounds of torque
- 1/2 inch drive, fixed square
- 20 volt MAX, tool only
- 8.43 inches long, 6.4 pounds
- SAE (inch), ratcheting
- Not non-sparking, brushed plastic body
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A high-torque half-inch cordless impact wrench sold as a bare tool. Buy a compatible battery and charger separately, or choose a kit.
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ASIN: B0B9T68W3BModel: DCF900BCategory: Impact Drivers & Wrenches
Overview
Loosening large bolts and lug nuts without an air line is the job of this DEWALT impact wrench, which has a fixed square drive and a socket end. The body is plastic with a brushed finish in black and yellow.
Very high rated torque lets it free fasteners that smaller impact wrenches cannot move, and it works without a compressor. The bare-tool format and the plastic body are the trade-offs to weigh before ordering.
Who it's for
Truck, farm and equipment work with large fasteners rewards the torque. A homeowner with one tire rotation a season can use a smaller wrench or a kit with a battery.
Pros and cons
- Very high torque rating
- Half-inch fixed square drive
- Ratcheting action listed
- No battery or charger
- Plastic material listed
- Heavy for overhead use
- Not rated non-sparking
Performance notes
Impact action delivers torque in rapid blows, so stubborn fasteners release without a long reaction force on the operator. The battery decides how much of the rated torque is available, and a weak pack gives less on rusted bolts.
Specifications
| Brand | DeWALT |
|---|---|
| Model | DCF900B |
| Dimensions & fit | |
| Item Length | 8.43 incheslower than 62% of 111 impact drivers & wrenches |
| Item weight | 6.4 pounds |
| Power & efficiency | |
| Voltage | 20 voltshigher than 54% of 135 impact drivers & wrenches |
| Construction & materials | |
| Material Type | Plastic |
| Finish Types | Brushed |
| Color | Black/Yellow |
| Included components | |
| Included Components | DCF900 impact wrench |
| Unit Count | 1.0 Count |
| Other details | |
| Item Torque | 1400 foot poundshigher than 93% of 84 impact drivers & wrenches |
| Head Style | Fixed Square |
| Measurement Standard | SAE (Inch) |
| End Style | Socket End |
| Is Racheting | Yes |
| Is Non Sparking | No |
| Item Type Name | 1/2 inch, 20-Volt MAX, tool only |
| Operation Mode | Battery |
Closest rivals on specs
AEROPRO A398 1/2 in Aluminum Air Impact Wrench- Item Length 8.43 vs 7.5 inches (+12%)
Frequently asked questions
Which batteries work with the DEWALT DCF900B?
It is listed as a 20-volt MAX tool, so it takes the matching 20V MAX battery family. No battery is included.
What is included with the DEWALT DCF900B?
Only the DCF900 impact wrench. The item name says tool only.
Is the DEWALT DCF900B safe near fuel vapor?
No. The listing states it is not non-sparking.