The DEWALT DCF870B 20V MAX XR 1/4 in. Quiet Hydraulic Impact Driver is a cordless hydraulic impact driver built for fastening where noise, access, and control all matter. This is a hydraulic impact driver designed for driving screws, lags, and common fasteners in framing, cabinetry, metal fastening, and general jobsite work. Model Number: DCF870B. As a bare tool, it is aimed at users already on the DEWALT 20V MAX platform who want a compact impact driver that hits hard but sounds noticeably less harsh than a standard impacting mechanism.

The headline feature here is the hydraulic drive system. DEWALT rates it as up to 57% quieter during impacting, which is a real advantage for work in schools, offices, hospitals, apartment turnovers, punch-list jobs, and any occupied space where a regular impact driver can be too loud. Quiet usually comes with a tradeoff, but this tool is also built to drive fast, with up to 3,000 RPM, up to 4,200 impacts per minute, and published claims of up to 40% faster driving in demanding applications. In plain terms, it is meant to give you the smoother feel and reduced noise of a hydraulic impact driver without turning into a slow specialty tool.

Size is another big reason this tool makes sense. At roughly 4 in. long and 2.2 lbs as a bare tool, the DCF870B is clearly set up for tight access. That short head length helps when you are running screws between studs, inside cabinet boxes, around ductwork, or close to electrical panels and hardware. The 1/4 in. quick-connect hex chuck keeps bit swaps simple, and the forward/reverse rocker switch plus variable speed trigger make it easier to stay controlled when you are starting screws in finished material or delicate hardware.

DEWALT also built in practical jobsite features instead of treating this like a stripped-down compact driver. The brushless motor is there for efficiency and long-term durability. The 2-speed mode select gives you a way to match output to the job, which is useful when you need one mode for controlled fastening and another for pushing larger screws faster. The integrated 9-LED work light is more than an afterthought too, with a 20-minute work light mode that helps when you are working in utility rooms, under cabinets, in attic spaces, or late in the day when shadows hide the fastener head.

From a real-world use standpoint, this tool is a strong fit for contractors who work around people. Finish carpenters, cabinet installers, maintenance crews, remodelers, commercial punch-out teams, electricians, and HVAC installers all run into jobs where a full-size, sharp-sounding impact driver is more annoying than helpful. The quieter operation can make the work more comfortable for you and less disruptive for everybody nearby. It also helps if you spend long stretches driving fasteners overhead or in repetitive work, where the smoother hydraulic feel tends to be less fatiguing than a more abrupt hammering action.

The DEWALT DCF870B 20V MAX XR 1/4 in. Quiet Hydraulic Impact Driver runs on the DEWALT 20V MAX battery system and is sold here as a bare tool, so battery and charger are not included. If you are already invested in DEWALT cordless tools, that makes this an easy add to the lineup instead of buying into a separate platform. It accepts standard 1/4 in. hex impact bits, so you are not locked into unusual accessories. If you want a compact impact driver for fastening in tight spaces, want strong output, and are specifically trying to cut down jobsite noise, this is one of the more purpose-built options in the DEWALT lineup.

DEWALT DCF870B 20V MAX XR 1/4 in. Quiet Hydraulic Impact Driver for Pros Who Need Less Noise

The DEWALT DCF870B makes a lot of sense for anyone who wants compact size, strong fastening speed, and a big drop in noise without stepping out of the DEWALT 20V MAX system.

• Who it's for: Remodelers, finish carpenters, electricians, HVAC techs, maintenance crews, and anyone working in occupied buildings or tight interiors.
• Why it stands out: The hydraulic mechanism keeps the sound down, but the tool still runs up to 3,000 RPM with 4,200 IPM, so it is not giving up the pace you expect from a real impact driver.
• Worth knowing: This is a bare tool. You need a DEWALT 20V MAX battery and charger, and if your work is mostly heavy lag driving all day, you may still want a larger high-torque option in the truck.

• Is this a standard impact driver or a hydraulic impact driver? It is a hydraulic impact driver. The hydraulic mechanism is what helps reduce noise during impacting compared to standard DEWALT cordless impact drivers.
• What battery platform does it use? It is part of the DEWALT 20V MAX platform and uses compatible DEWALT 20V MAX lithium-ion batteries.
• Does it use standard impact bits? Yes. It has a 1/4 in. quick-connect hex chuck for standard impact-rated 1/4 in. hex bits.
• Does this tool have a work light? Yes. It includes an integrated 9-LED work light with a 20-minute work light mode.