The middle of the size range wrenches should be in every household tool kit and are a great thing to have as a professional. If you know you know. For those that don't these are better than any other adjustable wrench tools meant for hex fasteners.

The smooth jaws make quick work of any bolt heads it encounters. Plus the low profile jaws of the smaller set can slip into any tight space and crank out results. Knipex delivers again with great quality in tools and consistent results. Definitely worth the money.

As others have stated, the 5” is kind of small. I needed a small pliers/wrench set for work that I could carry in the pocket. The 5” is perfect for that. The 7 1/4 would work too, but the 5” is about perfect for pocket carry, so you have something that will take care of some smaller bolts/nuts without having to search tool boxes. The 7 1/4 is great for larger jobs.
The 5” is small, but opens to a generous 7/8” or 23mm. The 7 1/4 opens quite a bit more at 1 1/2” or 40mm.
The 7 1/4 has the scale for metric and inch printed on either side. The 5” doesn’t have a scale on it. Both seem to be very high quality. They were a bit expensive, but I feel they are quality tools and worth the money.

Very well made. The 5" is small but acceptable for my small hands.
The 5" wrench has small head helps to access small area. If its handles is about 2" longer then it is perfect for every body.

Both pair of pliers are of very high quality, typical of Knipex tools. Ergonomic and useful, both pair are handy within their given size ranges. I like that Knipex started making these pliers with flat parallel jaws, my older Cobra pliers have really sharp teeth that easily damage smooth finishes. After using these pliers a few times, you will find yourself reaching for these first before trying the old style adjustable wrench.

As others have mentioned, the smaller 5" pair of pliers might be too small for some expectations, but they still prove to be very useful where you only need to turn something a few times or in tight spaces where it's just too cumbersome to use a larger wrench. The jaw opening is generous, larger than you'd expect. The profile of the jaws is thin also, a benefit some might overlook, proving useful in certain circumstances. They fit into the pocket much easier than the larger pair. There are no size graduation markings like the larger pair have. I have included a few pictures of me holding these in my average sized hand to show you how the size so you can decide for yourself if these are what you are looking for.

The larger 7" pair are the more typical standard/expected size of pliers. There are size graduation markings on both sides, one side in metric and the other side in inch. If you were to buy one pair of pliers from Knipex to start your collection, this would be the size I recommend you start with.

I have noticed within the Cobra line that Knipex will sometimes make changes or improvements to their pliers without changing the part number. They appear to do this in their Pliers Wrench line also. I do not like that they use the same part number when doing this, but functionally, there is not much change in the pliers themselves.

Las compre como alternativa de uso de las llaves crescent que se aflojan o sueltan del ajuste con facilidad.

Estas herramientnas tienen un ajuste controlado por un boton que se presiona y se desliza a la apertura deseada. El mecanismo de este boton es muy buena idea y la solidez del ajuste es increible, no se mueven y puedes abrir y cerrar como pinzas, pero con el cabezal de una crescent.

El material es de muy buena calidad y fisicamente al tacto se sienten rudas y duraderas.

El boton de ajuste es lo unico que veo problematico en sentido que no siempre desengancha o engancha con facilidad, a veces es necesario presionarlo con mas fuerza y en todas las ocasiones es necesario mover la herramienta ligeramente para que el seguro se "enganche" pero eso es mucho menos tardado que estar ajustando una crescent, asi que vale la pena el cambio aunque tenga este detalle.

Don’t be fooled by the photos and make sure to read the description and do your research, these are the MINI version which is exactly what I wanted for my field of work, easily the best tool innovation in the past 5-10 years and became my go-to wrench the minute I took them out of the box, could definitely replace a regular adjustable wrench as well as channel locks for the majority of applications, having teeth is occasionally beneficial with channel locks as well as not needing to squeeze at all with an adjustable wrench but in general these are far better than both, excellent clamping force due to the cam design and never mars or rounds off bolts as well as more and better contact area due to the smooth jaws and parallel movement. Also even if they were to slip they won’t pinch your fingers like channel locks because the handles never touch even at the largest setting. Only thing is this listing seems to be somewhat inconsistent, mine came with a perfect Beautiful fit and finish and the size settings were all labeled, others seem to have gotten worse finishes and no size labeling. This is also the newer design, without having experienced the older ones I can’t say if one is better or worse but these are fantastic regardless

I've had my eye on Knipen wrench pliers for a while. The smooth. parallel jaws mean they're both non-marring and can be used like a wrench as the name suggests.

I was excited when I saw these on sale so added to cart and bought them. Imagine my surprise when they arrive and they're tiny! Now, this is in the product description so entirely my fault, but just be careful - there are the 5" and 7" varieties, not the 10" and 12".

Other than the diminutive size (the 5" are so cute!) these are extremely well made tools - forged, matte finish (peened?) with very little slop and jaws that meet squarely. The jaws adjust and lock positivity with a spring-loaded press-button in ~1/16" increments. And unlike slip locks they can't pop out under load. The 5" adjust from 0-13/16" and the 7" have a range from 0-11/2" (0-40mm). On the larger pliers the measurement were laser-etched on the side for easier adjustment.

As mentioned, the jaws remain parallel so the flats can engage with nuts and pipe fittings without ruining/rounding off corners. The 5" jaws are quite narrow (~1/8") so obviously not for massive torque; the 7" pair is 1/4" wide so can fit into smaller areas but still able to hold some grunt.

I decided to keep them and will probably augment the set with a larger pair. I'm sure these will find a use and replace the crappy slip-locks I used previously.