About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

GJEMAX
GJEMAX 18V Cordless Impact Wrench

Manufacturer’s product description

The GJEMAX 18V Cordless Impact Wrench is a versatile tool set for DIY enthusiasts working on home or vehicle projects. With a maximum torque of 520 Nm, three power settings, and a 3-in-1 function (screwing, drilling, and loosening nuts), the tool is suitable for various applications such as tire changes or assembly work.

The extensive range of accessories is particularly impressive: the set includes socket wrenches, drill bits, a bit set, and a sturdy tool case, so you can get started right away. Also practical is the powerful 6.0Ah battery, which, according to the manufacturer, offers a long runtime and is compatible with standard 18V systems. The easy handling and variable power control allow for good control while working.

Due to the powerful battery, the tool is slightly heavier, which can be noticeable, especially during prolonged use.

  • High torque of up to 520 Nm
  • 3-in-1 function (screwing, drilling, loosening nuts)
  • Extensive range of accessories
  • Heavy weight due to large battery

First impression

Packaging and contents

Here, we take a closer look at the packaging. Sustainability is becoming an increasingly important factor. In addition, of course, adequate protection of the product must be ensured. Is the contents of the package complete, and does the manufacturer make it as easy as possible for me to use the product right away?

Here, we take a closer look at the packaging. Sustainability is becoming an increasingly important factor. In addition, of course, adequate protection of the product must be ensured. Is the packaging complete, and does the manufacturer make it as easy as possible for me to use the product right away?

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Product protection

Box is sturdy, product is adequately protected

100

Points

Sustainability of packaging

Unnecessary packaging waste has been eliminated; the plastic film protects the product components

80

Points

Package contents & scope

Complete

100

Points

Instructions

Product is self-explanatory; instructions for use available in multiple languages

100

Points

OVERALL

95

Points

Weighting: 20%
*The maximum score is 100 points

The GJEMAX 18V cordless impact wrench made a solid and well-organized impression right from the moment it was unpacked. The tool comes in a sturdy carrying case, which is housed in a standard shipping box and reliably protects the contents from damage. A particularly positive feature is that all accessories—such as sockets, bits, drill bits, and the battery —are neatly arranged and securely fastened, ensuring nothing shifts during transport.

The powerful battery and charger are neatly packaged and can be put to use quickly. Operating the tool is largely intuitive, so you can start working right away. An instruction manual is included, though it is rather brief and could be more detailed in some areas. Overall, the neat packaging and organized arrangement of the accessories leave a positive first impression and convey the sense of a well-thought-out complete set.

A multilingual user manual is included with the product.

First time in hand

Product build quality and appearance

Before moving on to the practical test, we take a close look at the product’s build quality. How high-quality are the materials used? Are the feel and appearance satisfactory?

Before putting the product through practical testing, we take a close look at its build quality. How high-quality are the materials used? Are the feel and appearance satisfactory?

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Visual appearance

Attractive design

100

Points

Workmanship

Very good build quality

100

Points

Stability

Very stable

100

Points

Product sustainability

No information

90

Points

OVERALL

98

Points

Weighting: 20%
*The maximum score is 100 points

The GJEMAX 18V cordless impact wrench impresses right from the first touch with its robust and solid build quality, which is well-suited for use in DIY projects. The visual appearance is modern and functional, with the housing feeling sturdy and fitting comfortably in the hand. A particularly positive feature is that the rubber grips on the handle ensure a secure hold and make working more comfortable. The sturdiness of the tool and the included carrying case give the impression that the set is well-protected even with frequent use. Another plus is the well-designed accessory set, which is neatly finished and gives the impression of a complete package. Overall, the GJEMAX 18V Cordless Impact Wrench presents itself as a solid and functional tool that makes a good impression both visually and in terms of quality and appears well-suited for typical DIY projects.

Here are the results of our hands-on test

Does the manufacturer live up to its advertising claims?

Our practical test carries the highest weighting. Here, the product must undergo a wide variety of criteria and tests. We evaluate the functions and product claims of the test item.

Our practical test carries the highest weighting. Here, the product must undergo a wide variety of criteria and tests. We verify the functions and product claims of the test item.

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Safety during use

Secure grip and controlled operation

90

Points

Vibrations during use

Low vibration during operation

90

Points

Effectiveness with different screw sizes

High efficiency with small and large screws

100

Points

Temperature development

Moderate heat generation during prolonged use

90

Points

Handling and ergonomics

Ergonomic design for comfortable work

90

Points

OVERALL

92

Points

Weighting: 45%
*The maximum score is 100 points

In practical use, the GJEMAX 18V Cordless Impact Wrench largely meets the expectations one has for a tool in this class. With its high torque of up to 520 Nm, wheel nuts and screws can be reliably loosened and tightened in many cases, making it particularly suitable for tire changes and typical assembly work. The multi-stage power control allows the force to be adjusted to different materials, enabling more controlled work. The rubberized grip surface ensures a secure hold during use and reduces the risk of slipping, even during prolonged use. Additionally, the powerful battery offers solid runtime, allowing multiple tasks to be performed in succession without the need for constant recharging. Its ease of use is particularly practical, as tool attachments can be changed quickly and the device is ready for use with minimal effort. Thanks to the extensive accessory set, the impact wrench is equipped for many applications without the need for additional tools. The compact and functional design facilitates use in tight spaces and makes working more comfortable overall. Overall, the GJEMAX 18V cordless impact wrench impresses with a good combination of power, functionality, and ease of use, making it a particularly useful tool for DIYers and occasional use.

Test Plan

You can find a detailed overview of the evaluation criteria for the practical part of the test as well as the point distribution here. If you are also interested in the evaluation of our other test criteria, please read our document on the evaluation process.

Value for money

Finally, we examine how the product compares to the competition. Can it compete with the competition in terms of price and quality? Would we generally recommend purchasing it?

Finally, we examine how the product stacks up against the competition. Can it compete with the competition in terms of price and quality? Would we generally recommend purchasing it?

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Value for money

Very good performance in the lower price segment

90

Points

TOTAL

90

Points

Weighting: 15%
*The maximum score is 100 points

Prices of up to€269.99are listed online for comparable products. Very affordable products areavailablestarting at€79.99. TheGJEMAX cordless impact wrenchis currently inthe lower price segment with a price of€119.99. The value for money is rated as very good. This rating takes into account both the high quality and performance as well as the price in the lower segment, resulting in a very good overall value.

Overall result

1. Packaging & Contents

20%

95

Points

2. Product Workmanship & Appearance

20%

98

Points

3. In practical testing

45%

92

Points

4. Value for money

15%

90

Points

TOTAL

94

Points

*The maximum score is 100 points

GJEMAX 18V Cordless Impact Wrench
 of the brand 
GJEMAX
achieved
94
Points in our test and therefore passed. The test was carried out in the test period
04/26
and is stored in our database under the licence number
260302006
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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Our product evaluations are carried out exclusively through direct, on-site tests. This ensures a detailed and specific examination of the product properties. You can find more information about the test procedure here.

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