CRAFTSMAN CMCF921B Impact
- Impact
- 3.97 pounds
- 20 volts
- Better rated than 62%
- More reviewed than 56%
A 20-volt Craftsman impact tool with the strongest combination of rating and recent demand in this batch, from a brand with an established cordless platform.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 284 impacts we track
4.7★ across 500 Amazon ratings, Bayesian-smoothed toward the category average.
500 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
700+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 284 impacts we track - how the scorecard works · full impacts data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Twenty volts and 3.97 pounds define what's known about the CRAFTSMAN CMCF921B, filed under Tools > Impacts. That weight matches a bare tool sold without a battery, in line with how Craftsman typically lists items in its 20V lineup.
Craftsman is an established name in cordless power tools, and the 20V platform this model belongs to is widely used, meaning batteries and chargers from other Craftsman 20V tools are likely to work with it. The listing does not specify drive size or impacts per minute, so match those against your intended use before buying if precision torque matters.
- Model CMCF921B from Craftsman
- 20-volt, item weight 3.97 pounds
- Listed under Tools > Impacts
- 4.7 rating across 500 reviews, 700 bought in the past month
Who it's for
Fits buyers already invested in Craftsman's 20V battery platform who want a bare impact tool to add to it, as well as anyone doing automotive, construction or general fastening work. Buyers starting from zero should check whether a battery and charger are included, since the weight suggests this may be a bare tool.
Strengths and trade-offs
Drawn from this product's published specifications.
- From an established cordless platform (Craftsman 20V)
- 700 bought in the past month, tied for the highest demand in this batch
- Rated 4.7 across 500 reviews
- Weight suggests a bare tool, so confirm whether a battery and charger are included
- Drive size and impacts-per-minute not listed
Performance notes
Impact tools deliver rotational force in rapid bursts rather than continuous torque, which is what lets them drive and remove fasteners without the operator fighting the tool's twist. At 3.97 pounds and 20 volts, it sits in line with typical compact impact wrenches or drivers on this platform, though the listing does not break out drive size or impacts per minute.
Specifications
| Brand | Craftsman |
|---|---|
| Model | CMCF921B |
| Item Weight | 3.97 pounds |
| Voltage | 20 volts |
Other Craftsman impacts
How it compares
This product against the closest alternatives we track in impacts.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| CRAFTSMAN CMCF921B ImpactThis product | 4.7 / 5 | 500 | 4.2 / 5 |
| DEWALT DCF845B ImpactDeWALT | 4.7 / 5 | 12,700 | 4.5 / 5 |
| Milwaukee 2457-20 ImpactMILWAUKEE | 4.6 / 5 | 8,078 | 4.5 / 5 |
| GEARWRENCH 81270 ImpactGEARWRENCH | 4.7 / 5 | 4,983 | 4.4 / 5 |
| AOBEN AB7331T ImpactAOBEN | 4.4 / 5 | 10,707 | 4.4 / 5 |
Similar impacts from other brands
Questions about the Craftsman CMCF921B
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is the CRAFTSMAN CMCF921B a full kit with a battery?
The listed weight of 3.97 pounds is consistent with a bare tool, so confirm whether a battery and charger are included before ordering.
What voltage does it run on?
20 volts, matching Craftsman's 20V cordless platform.
How does demand for this tool compare to others in this batch?
It ties for the highest recent purchase volume in this group at 700 bought in the past month.