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TONE GNR-81E Electric Torque Wrench

The GNR-81E square-drive nut runner features clockwise and counterclockwise directions, a torque setting dial, and LED indicator lights.

Fully Tensioned Structural Bolts: 

A325 – 5/8″, 3/4″, 7/8″

A325M – M16, M20, M22

A490 – 5/8″, 3/4″

A490M – M16, M20

Adjustable Torque Range: 

250–600 ft-lb. (340–800 N-m)


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Voltage 110-120 V 220-230 V
Maximum Current 14.5 A 7.5 A
Maximum Power Consumption 1,650 W 1,650 W
Adjustable Torque Range 250~600 ft-lb. 340~800 N-m
No-load Speed 19 rpm 19 rpm
Square Drive Size 3/4″ drive 3/4″ drive
Weight 11.9 lb. 5.4 kg
Repeated Accuracy ±5% ±5%

Available Accessories

  • X-Holder Extension 100mm (3-7/8″)
  • Digital Torque Meter DTM 8
  • 3/4” (19mm) Square-Drive Sockets
  • Bar Sockets


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Kind words from our customers:

  • GWY’s parts inventory and response is top notch. You can expect prompt, respectful, knowledgeable answers to questions and full cooperation when you need it. Truly a mark of a reputable company with a good team.”

  • From choosing the right equipment for each job’s unique requirements to problem solving in the field, GWY is always willing to go out of the way to find a solution. Mix that customer service in with their technical expertise and easy-to-use tools, they really help make bolt up easy.”


What is the lead time on getting this tool to me?

If we have it in stock, we can send it next day air within the US to get to you tomorrow.

Is there a warranty on your tools?

1-year manufacturers defect warranty on new tools.

Does the tool come with anything?

All of our tools come with a case.  Our Turn-of-Nut & Shear Wrenches come with the one size socket and a metal case.  The cordless tools come with one or two batteries, a charger, and a case.