DEWALT 20V MAX Hydraulic 1/4" Impact Driver DCF870B — Brushless, Compact, Quiet Performance

The DEWALT 20V MAX 1/4" Hydraulic Impact Driver (DCF870B) is a compact, brushless cordless driver that uses a hydraulic mechanism to deliver consistent high torque while running significantly quieter than conventional impact drivers.

This impact driver pairs a brushless motor with an advanced hydraulic system to give pro users repeatable driving performance for framing, cabinetry and tight-space fastener installation. Its compact body and ergonomic shape are designed to reach into crowded work areas, while integrated LEDs brighten the workspace. Battery and charger are sold separately.

How does the hydraulic system improve fastening?

The hydraulic mechanism smooths energy transfer between the motor and the bit, producing reliable impacts with less vibration and more consistent torque from hit to hit. That consistency helps when driving long screws or lag bolts where uniform force matters.

• Hydraulic impact assembly reduces peak shock to the tool and fastener
• Delivers industry-leading maximum torque for a 20V MAX hydraulic driver
• More consistent output for repeatable installations

Will it be quieter on busy jobsites?

This model is engineered to operate with substantially reduced noise compared with older DCF787-style drivers, making it easier to work in noise-sensitive environments and reducing auditory fatigue over long shifts. The quieter operation doesn’t sacrifice power.

• Up to 57% noise reduction versus earlier impact drivers**
• Quieter impacts help when working inside occupied buildings or near clients
• Maintains driving speed and torque while lowering sound output

How fast and visible is performance in low light?

The DCF870B accelerates through large screws faster than prior models thanks to optimized drive speeds and a high-efficiency motor. For dark corners, nine built-in LEDs provide a very bright work area and include a 20-minute work light mode to keep a job visible after the trigger is released.

• Up to 40% faster driving in common large-screw applications***
• Nine LEDs for up to 6× brighter illumination* with dedicated work-light timer
• Two speed settings tuned for precise installs or rapid driving

Can this handle tight spaces and cold conditions?

Its compact 1/4" hex nose and ergonomic body let you reach into cramped assemblies like jambs, cabinet interiors and crowded framing bays. The drive train and electronics are designed to keep delivering consistent performance even in colder jobsite temperatures.

• Short head profile for improved access in confined areas
• Ergonomic grip and balanced weight for one-handed control
• Engineered to perform in demanding, low-temperature conditions

Who is this for? The DEWALT DCF870B is aimed at professional carpenters, framers, cabinetmakers and mechanical tradespeople who need a compact but powerful impact driver with repeatable torque, reduced noise and excellent lighting. It’s also a good upgrade for users who want hydraulic-style impact performance without sacrificing speed or maneuverability. Note: purchase a compatible 20V MAX battery and charger to complete the kit.

• Key features include: brushless motor, hydraulic impact mechanism, 1/4" hex, two speed settings, nine LEDs, belt hook and a 3-year limited warranty.