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Product Details

Production Description

Cordless Impact Wrench

20V Cordless Wrench
Power Source 20VDC 20V DC
Maximun Torque 320NM 160NM
Battery Capacity 4000mAh 4000mAh
Rated Speed 0-3200rpm/0-3400bpm 0-3200rpm/0-3400bpm
Wrench Head Size 1/2inch(12.7mm) 1/2inch(12.7mm)
Charging Input Voltage 100-240V AC 50/60Hz 100-240V AC 50/60Hz
Charging Output Voltage 20.8V DC 20.8V DC
Charging Output Current 1000mA 1000mA
Motor Type Brushless motor Brush motor

Cordless Impact Wrench

1,Aluminum head shell(with heat cover)
2,1/2inch head(Not included socket)
3,LED Light
4,Variable Speed Switch
5,Function Center
6,Cooler hole
7,Forward-Reverse button
8,4000mAh Battery
9,Battery Locked-released Button

Cordless Impact Wrench

Effect Of Temperature On Battery Performance

Temperature Work status Work efficiency Work time
-20°C~0°C Inefficient work 50% short
0°C~16°C Normal work 90% Normal
16°C~22°C Normal work 100% Normal
22°C~40°C Normal work 90% Normal
40°C~50°C Inefficient work 50%
50°C~+ Can’t work

Cordless Impact Wrench

  • Press lighter,low speed.
  • Press harder,high speed.
  • GJS No-pole speed trigger makes it work freely and totally in your full control.

  • Function Center
  • Adjustable panel,make work more convenient.

Cordless Impact Wrench

Function Center
1,Battery capacity indicator
2,Work indicator
3,Reverse rotation auto-stop mode indicator
4,Low speed indicator
5,High speed indicator
6,Yellow button

Light indication


Reverse rotation auto-stop mode
Forward hige speed
Forward low speed

What is “reverse rotation auto-stop mode”

  • reverse rotation auto-stop mode stops rotation in two seconds when fastener is adequately loosened, making the Prostormer Cordless Impact Brushless Wrench ideal for home tools, installation, and fabrication trades.

How to set the reverse rotation auto-stop mode:

  • please press the “forward/reverse button “to reverse,then you can press the yellow button to into reverse rotation auto-stop mode (the indicator will light).
  • tips:when the cordless into reverse rotation auto-stop mode,it can’t change the torque to lower or stronger.
  • if you don’t need reverse rotation auto-stop mode ,please press the yellow button ,the indicator will close the light.

Cordless Impact Wrench

1,Aluminum head shell(with heat cover)
2,1/2inch head(Not included socket)
3,LED Light
4,Variable Speed Switch
5,Battery Locked-released Button
6,Cooler hole
7,Forward-Reverse button
8,4000mAh Battery

Where to use???

Cordless Impact Wrench

Install Accessories

Cordless Impact Wrench

put insert the wrench to the wrench head put insert the pin to the wrench head hole push the rubber ring to cover the pin

How to choose the plug???

The plug of charger is EU plug,if you choose other type plug,we will provide adapter,please choose the plug of your country.

EU plug US plug adapter AU plug adapter UK plug adapter

other most contries

United States






other country and area


New Zealand


United Kingdom


Hong Kong

Most of Middle East countries



other country and area

Item Specifics
Power Source:
Rechargeable Electric Wrench
Model Number:
Rated Voltage:
Rated Input Power:
Max. Torque:
No-Load Speed:
Power Source:
Home DIY
Brand Name:
Blue Electric Wrench
Lithium Battery Long Life Wrench
Can be used as electric drill, impact wrench, electric screwdriver
Impact frenquency:
Cordless Impact Wrench
DIY Supplies:
Brush Wrench Torque:
160 NM
Brushless Wrench Torque:
320 NM
Shipping & Payment


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of jonaki (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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