What's inside
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When a structural screw starts hardening in framing lumber, a basic impact driver can stall, overheat, or leave the fastener only partly seated. The DeWalt DCF860 and Makita XDT20 are both high-output 18V/20V-class impact drivers aimed at that job. They are compact enough for everyday fastening, but have substantially more output than typical entry-level models.
The short version: the DCF860 has the higher published fastening torque and is the better choice when large structural screws and long ledger fasteners are regular work. The Makita XDT20 is a more controlled, versatile driver with excellent speed modes. If your structural work is occasional and you already own Makita LXT batteries, the XDT20 is usually enough.
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DeWalt DCF860 vs Makita XDT20: key specifications
| Feature | DeWalt DCF860 | Makita XDT20 |
|---|---|---|
| Battery platform | 20V MAX | 18V LXT |
| Published fastening torque | 2,500 in-lb | 1,950 in-lb |
| Maximum impacts per minute | Up to 4,000 IPM | Up to 4,400 IPM |
| Maximum speed | Up to 3,800 RPM | Up to 3,700 RPM |
| Drive | 1/4-inch hex | 1/4-inch hex |
| Control | Three speeds plus application modes | Four speeds plus assist modes |
Published torque figures are useful for comparing tools from the same brand, but they are not a guaranteed amount of force at the screw. Battery condition, bit quality, screw diameter, wood density, and the test method all affect real performance. Neither driver replaces a torque wrench for bolted connections.
How they handle structural screws
The DCF860 has the clear output advantage on paper. Its 2,500 in-lb fastening rating gives it more reserve for 5/16-inch and 3/8-inch structural screws, especially when driving through multiple members or into dense, wet, or treated lumber. It is less likely to slow dramatically as the screw encounters knots or a tight pilot hole.
That extra power is useful, but it also makes mistakes easier. A long structural screw can be driven below the surface quickly, crushing the washer or damaging the head. The DCF860 can also snap a bit or strip a recess when the operator holds the tool at an angle or continues driving after the screw is seated. Use a fresh impact-rated bit and release the trigger as soon as the head reaches the specified depth.
The XDT20 is not weak. Its 1,950 in-lb rating is ample for most structural screws used in deck framing, ledger reinforcement, post bases, and timber connections when the correct pilot hole is used. It may take longer to finish a large fastener, and it has less margin when a screw is driven into very hard material, but that is not the same as being unsuitable.
For repeated 6-inch or longer structural screws, the Makita’s lower output can become noticeable. The tool may need more trigger time, and a small battery can sag under sustained load. A larger LXT pack helps, though it adds weight.
Control, speed, and driving accuracy
Makita’s strongest argument is control. The XDT20 provides four selectable speed ranges and assist features intended to reduce cam-out, thread damage, and overdriving. Those settings are valuable when switching between structural screws, cabinet hardware, self-tapping screws, and ordinary construction screws during the same job.
Its slower modes make it easier to start a screw straight and stop near a washer or metal bracket. The assist settings can also reduce the tendency of a screw to walk across a metal surface. They do not make the driver automatic, however; the operator still controls final seating.
The DCF860 also offers multiple speeds and application-oriented modes, so it is not simply an uncontrolled brute. Its higher output is best used deliberately: start in a lower setting, keep the driver aligned with the fastener, and shift higher only when the screw needs more speed or the material allows it. For repetitive structural work, the DeWalt’s power can mean fewer stalls and less time leaning into the tool.
Size, balance, and battery choice
Both tools use a compact 1/4-inch hex nose and fit into spaces where a drill or mid-torque impact wrench would be awkward. The real difference in handling often comes from the battery. A compact 1.5Ah or 2.0Ah pack keeps either driver nimble for overhead work, but a 4.0Ah or 5.0Ah pack is more sensible for long structural screws.
The larger battery adds weight below the grip and can make the tool feel more stable during high-load driving. It also reduces voltage sag and avoids frequent battery changes. For ladder work or repeated joist fastening, though, the lighter pack may be worth the shorter runtime.
If you are buying into neither platform, compare the tool with the battery kit rather than comparing bare-tool prices. A cheaper bare driver is not a bargain if it requires a new charger, batteries, and replacement accessories.
Bits and technique matter more than the final torque number
Use impact-rated 1/4-inch hex bits matched to the screw recess. Standard drill bits can twist and shatter under impact loading. Replace a bit when its tip is rounded or begins slipping; continuing to use it is a common cause of stripped structural-screw heads.
Follow the screw manufacturer’s pilot-hole and embedment instructions. A pilot hole that is too small increases heat and driving resistance. A hole that is too large reduces holding power. Keep the driver square to the screw, support the workpiece, and stop when the washer is seated rather than burying it in the wood.
For unusually large fasteners, a dedicated cordless impact wrench may be the right category instead. An impact driver’s 1/4-inch hex chuck limits it to driver bits and adapters, while an impact wrench accepts sockets and handles larger hex-head structural hardware more safely.
Which one should you buy?
Choose the DeWalt DCF860 if structural screws are a major part of your work, you frequently drive large fasteners into dense lumber, or you want the greatest reserve power in this comparison. It is the more convincing choice for contractors who cannot afford repeated stalls and already own DeWalt 20V MAX batteries.
Choose the Makita XDT20 if you value speed selection and controlled driving, already use Makita LXT batteries, or mostly drive medium-size structural screws with proper pilot holes. The cheaper option is fine when structural fastening is occasional and your projects do not involve long, large-diameter screws all day.
Whichever driver you choose, budget for quality structural screws, compatible bits, and the correct battery. More torque cannot compensate for a damaged bit, poor alignment, or a fastener installed without following the connection manufacturer’s instructions.