Porter-Cable 20V MAX Impact Driver 4 inch
Score: 72/100
DEWALT DCF845B
Score: 82/100Rankings
The DEWALT DCF845B is a brushless 20V MAX XR impact driver delivering 1,825 in-lbs of torque and 3,400 RPM with 3-speed settings. It offers a balance of power and compactness, though the tool-only configuration requires separate battery purchase. It is best suited for professional contractors needing versatile fastening capabilities.
The Porter-Cable 20V MAX Impact Driver offers a budget-friendly solution for DIYers with 1,400 in-lbs of torque and fast charging capabilities. The brushed motor is a trade-off for the lower price, leading to shorter runtime and potential heat issues during prolonged use. It is best suited for homeowners and light trade pros needing affordable power for occasional tasks.
| Attribute | | |
|---|---|---|
1,400 in-lb | 1,825 in-lbbest | |
20 Vbest | 20 Vbest | |
2,700 RPM | 3,400 RPMbest | |
3,100 IPMbest | — | |
| ↓ lower better | 4.7 lbs | 2.2 lbsbest |
1.5 Ahbest | — | |
| ↓ lower better | 11.4 in | 5.1 inbest |
1 count | 3 countbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(2) | ||
Maximum Torque (in-lb) | 1400 in-lb | 1825 in-lb |
Maximum Speed (RPM) (RPM) | 2700 RPM | 3400 RPM |
Accessories(1) | ||
Includes Battery | true | false |
Build & Design(2) | ||
Tool Weight (lbs) | 4.7 lbs | 2.2 lbs |
Tool Length (in) | 11.4 in | 5.1 in |
Power & Battery(1) | ||
Battery Chemistry | Lithium-Ion | Lithium-ion |
Features(3) | ||
LED Light Count (count) | 1 count | 3 count |
Chuck Type | 1/4-inch hex | 1/4-Inch Hex |
Belt Clip | null | true |
Controls(2) | ||
Speed Settings | Variable | 3-speed |
Trigger Type | Variable speed | Variable Speed |
Products in the top-left offer the best value (high score, low price).
Professional reviewers highlight the Porter-Cable 20V lineup for its value-driven performance, noting strong torque and adequate runtime in brushed models. They praise the tool's compactness for jobsite productivity but note it is not top-tier for professionals needing maximum power.
Everyday users love the lightweight build and ease of use in tight spaces, finding plenty of power for DIY screws and bolts. Recurring complaints include brushed motor heat-up on prolonged use and shorter runtime compared to brushless competitors.
“plenty of power for DIY screws/bolts”
“good torque”
