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.

WERKTHOR
Trailer lock

The Werkthor trailer lock made a good impression in the test. The trailer lock with padlock including two keys is made of rustproof and weather-resistant steel. It is foldable and can be attached both coupled and uncoupled as anti-theft protection. The product is suitable for almost any coupling, except for anti-slinging couplings or large couplings. It is not suitable for coupled driving.
Thanks to the wing function, the box lock can be easily placed around the coupling to be protected and securely locked with the lock supplied.

Advantages

✅ Including padlock
✅ Can be used when hitched up
✅ For common trailer couplings
Stainless and weather-resistant

Disadvantages

❌ Not for anti-drift clutches

The first impression

Packaging and labeling

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be ensured.

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingUnnecessary packaging waste was avoided, items were packaged compactly, use of plastic80 points
Product labelingGS and TÜV marking available100 points
Total93 points
Weighting: 10%
*The maximum score is 100 points

The Werkthor trailer lock arrived in the typical Amazon box. The box was undamaged and easy to open by removing the adhesive tape. The box contained the trailer lock with accessories packed in a product box. It also contained a business card with a brief introduction to Werkthor. The lock itself and the other accessories were wrapped in plastic film. The plastic film might not have been necessary, but it protects the product and accessories from dirt and scratches. In this case, the product was fully protected and the trailer lock was therefore in perfect condition.
The packaging of the trailer lock is partially recyclable. Unfortunately, the plastic is not recyclable, but the Amazon box is.
Overall, the Werkthor trailer lock makes a very good impression. The lock was not damaged and the package was in good condition.

After unpacking

Package contents and instructions

ℹ️ Most people’s first impression after unpacking is immediately memorable. Are the contents of the package complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Package contents & scopeTrailer lock, steel shackle, lock with two keys, cover cap100 points
Instructions for useNot available, but not absolutely necessary80 points
Contact informationCan be found on the product box, no telephone number90 points
Total90 points
Weighting: 10%
*The maximum score is 100 points

After unpacking, five items were found on the workbench. In addition to the fob lock, there was a steel shackle, a cover cap, a padlock and two matching keys in the product packaging. There are no instructions for use. The contact information is given on the product box, only the hotline is missing. All in all, this is an exceptionally well thought-out and customer-friendly way of shipping a product.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the product processing. How high quality are the materials used? Is the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceGood visual appearance100 points
ProcessingGood workmanship, no edges or defects90 points
StabilityProduct appears predominantly stable and rigid90 points
Sustainability of the productNo information on sustainability, but the use of high-quality materials makes longevity obvious80 points
Total90 points
Weighting: 20%
*The maximum score is 100 points
The trailer lock from the front

The trailer lock is made of rustproof and weather-resistant steel without any annoying corners or edges. The box lock is not firmly connected by the hinge, but falls apart if it is not operated correctly. The steel bracket is also not firmly attached to the lock. However, this is the case with most rim locks and with a little practice it is not a problem.
Due to the high-quality materials used, we expect the lock to be extremely durable.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test is the most relevant and therefore the most important. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
HandlingEasy handling with a little practice90 points
UseEasy to use100 points
QualityGood and stable quality95 points
Total95 points
Weighting: 40%
*The maximum score is 100 points

We enjoyed using the trailer lockduring the test. The lock is sturdy and can be easily attached to the towbar with a little practice. The fact that the trailer lock can be opened completely also has advantages when installing it, as you can simply place the two parts around the coupling without any additional problems. The locking bolt can be inserted quickly and easily, as can the lock supplied. The cap supplied as protection for the towbar is also a nice addition.
A simple and common trailer lock for theft protection for trailers of all kinds.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we look at how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also examine consumer ratings and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioNo price comparison as not yet available on the market
Rating cutNot rated because not yet available on Amazon
Total

*The maximum score is 100 points

Not rated because not yet available on Amazon.

Overall result

WeightingScore achieved*
1. packaging & labeling15%93 points
2. package contents & instructions15%90 points
3. product processing & appearance25%90 points
4. in the practical test45%95 points
5. price/performance & consumer ratings
Total92 points
*The maximum score is 100 points
Trailer lock
 of the brand 
WERKTHOR
achieved
92
Points in our test and therefore passed. The test was carried out in the test period
02/23
and is stored in our database under the licence number
230120005
. 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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