Metabo HPT 18V 1/2-Inch Cordless Impact Wrench Review WR18DHQ4

Metabo HPT 18V Impact Wrench

The Metabo HPT 18V 1/2-Inch Impact Wrench Cuts Down on Weight, But Still Packs a Punch

With the advancement of brushless motor and battery technology, cordless impact wrenches are pushing performance levels further than ever before. However, squeezing every ounce of power out of a tool isn’t always the main priority–size is often a major factor as well. I’ve got my hands on the Metabo HPT 18V 1/2-Inch Impact Wrench to see how it stacks up to the competition and where it’s best suited on the jobsite.


  • Compact profile
  • For speeds with specialty modes
  • IP56 rating
  • Brushless motor
  • Kit comes with two batteries


  • No significant drawbacks

Metabo HPT 18V Impact Wrench Performance

Metabo HPT 18V Impact Wrench
  • No-Load Speed: 2800 RPM
  • Impact Rate: 4000 IPM
  • Max Fastening Torque: 255 ft-lbs
  • Max Breakaway Torque: 433 ft-lbs
  • Anvil: 1/2 in. friction ring with through hole

Power and Speed

On paper, this 1/2-inch mid-torque impact wrench has an impressive amount of power for its size. It produces up to 433 ft-lbs of breakaway torque and 255 ft-lbs of fastening torque. This is on the lower end when talking about the mid-torque class, but believe me, this thing is more than capable.

Speed settings

This impact wrench features four speed modes ranging from 1,200 RPMs up to 2,800 RPMs, plus two special modes that make it incredibly versatile.

ModeNo-Load Speed
Mode 11,200 RPM
Mode 21,800 RPM
Mode 32,400 RPM
Mode 42,800 RPM
No-Load Speed

The special modes include an Auto-Stop mode for fastening applications and an Auto-Slow mode for safer bolt removal

The auto-stop mode stops forward rotation to prevent over-tightening your fastener. One thing to keep in mind is the assist mode has no effect in reverse. Here’s how it changes in each mode:

ModeNo-Load SpeedAuto-Stop DelayApplication
Mode 11,200 RPM0.5 sec.Small diameter bolts
Mode 21,800 RPM0.5 sec.Lug nuts, light industrial work
Mode 32,400 RPM0.5 sec.Heavy machinery, steel framing
Mode 42,800 RPM1.0 sec.Heavy machinery, steel framing
Auto-Stop Mode

Auto-slow mode pauses rotation for a brief moment after the bolt is loosened and resumes rotation after 0.05 seconds, and then continues at 350 RPM. If you only pull the trigger halfway, the rotation speed will drop to a pre-determined speed to reduce the risk of losing the bolt and injury once it’s loosened.

ModeFull Trigger PullHalf Trigger Pull
Mode 10.5 sec. pause -> 350 RPM0-220 RPM
Mode 20.5 sec. pause -> 350 RPM0-380 RPM
Mode 30.5 sec. pause -> 350 RPM0-660 RPM
Mode 40.5 sec. pause -> 350 RPM0-830 RPM
Auto-Slow Mode

Metabo HPT 18V Impact Wrench Design Notes

Metabo HPT profile
  • Model: Metabo HPT WR18DHQ4
  • Power Source: Metabo HPT 18V or 18V/36V battery
  • Weight: 2.9 lbs (bare), 4.2 lbs (with 4.0Ah battery)
  • Head Length: 4.75 in.

Size and Weight

This impact wrench weighs in at 2.9 pounds as a bare tool and 4.2 pounds with the kitted 4.0Ah battery. Overall, the weight distribution is excellent, which makes it easy to maneuver and reduces fatigue during over long days. It stands 9-1/4 inches tall with the kitted battery, and the head measures 4.75 inches from tip to tail.

Additional Features

  • Wrist lanyard
  • Reversible belt hook

Metabo HPT 18V Impact Wrench Price

This impact wrench retails for $179 as a bare tool and $299 as a kit. The kit includes two 4.0Ah 18V batteries, a charger, and a storage bag. One nice thing about the Metabo HPT’s 18V platform is that they’re fully compatible with the 18V/36V MultiVolt batteries. This makes the WR18DHQ4 an excellent value if you’re already on that battery platform. Metabo HPT backs this tool with a limited lifetime warranty.

The Bottom Line

The Metabo HPT 18V 1/2-Inch Impact Wrench has you covered when it comes to tackling a full range of automotive and light industrial fastening tasks. Its adjustable speed and special modes add to the overall value and performance of this tool. After reviewing the performance specs, overall feature set, and getting a little hands-on time, I believe this is an excellent option for serious DIYers and the prosumer market.

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