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Nitro cordless rotary hammer with brushless motor 20V - tool only


Brushless motor, 3-function, SDS Plus, 2.0 Joule shot energy
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The new Worx Nitro cordless brushless SDS rotary hammer and chiseller performs 4700 beats per minute at up to 1,350 rpm, delivering 2.0 Joule of impact energy for drilling and chiselling in hard concrete. Featuring shock-absorbing anti-vibration technology.

  • 3 functions: drilling, hammer drilling and chiselling with a separate chisel angle adjustment.
  • Brushless motor technology delivers more power, runtime, and durability than a standard brushed motor.
  • 2.0 Joules of impact energy - Anti-vibration technology combined with an ergonomic design for improved comfort and control.
  • Fast drilling into concrete up to 22mm, the powerful tool is compatible with broadly available SDS Plus bits.
  • Variable speed with reverse function trigger switch for greater control when drilling
  • Bare tool, battery and charger not included. The tool is part of Worx PowerShare battery system, you can share any Worx PowerShare 18V (20V MAX) batteries.


Product description

The pneumatic rotary hammer mechanism of the new Worx WX381 cordless rotary hammer packs an impressive 2.0 Joules of impact energy for fast drilling and chiselling in reinforced concrete. Its brushless motor ensures high output power and longer runtime, delivering 1,350 revolutions per minute and 4,700 impacts per minute. Its lightweight, the balanced design comes in a compact form factor that allows access to hard-to-reach areas. When in chisel mode, the bit angle can be adjusted so that the operator can choose the most comfortable position, whichever the task. The supplied plug-in chuck converts the rotary hammer into a drill that uses round shaft bits. ​ This tool is part of the expanding Worx PowerShare, one of the most versatile cordless platforms that cover power tools, lawn and garden tools and everyday life products.

Key features

  • Brushless motor for cooler operation, more power, longer runtime and extended motor life
  • Compatible with broadly available SDS Plus bits
  • Shock-absorbing anti-vibration technology for improved comfort and control
  • Keyless chuck included to transform the hammer into a powerful woodworking and metalworking drill

Technical specifications and Manual

Battery & Charger

Power voltage supply 20 V Max

Basic Specifications



Capacity Masonry 22 mm
Capacity Steel 13 mm
Capacity Wood 28 mm
Impact Energy 2 J
Impact Rate 4700 bpm /
No Load Speed 0-1350 rpm

Weight & Dimensions

Weight without Battery 2.1 kg /

Download manual file

In the box

  • Rotary hammer WX3891.9 (1)
  • SDS drill bits (8 mm,10 mm,12 mm) (3)
  • Injection box WA0071 (1)

Same battery, expandable power

Stop buying batteries and chargers that fit one voltage only. Enjoy unlimited freedom of choice with Worx PowerShare™, the cordless system that adapts to your needs. As easy as combining bricks in construction toys.

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