simple and works well,

It is to take a good help to the knife in the same stay angle on the whetstone. The downside is only the change of the angle depending on the width of the blade. A knife with a 1 cm wide blade has a different angle wide through this angle bracket as a knife with a 2, 3, or even 4 cm blade.

I've been using it for about 2 cm knife with a wide blade, which I think it's well suited. As the quality is good, it is like a good un Hife because I find the price / performance ratio is also good.

In the description I miss the indication for which blade width, these grinding aid is recommended.

Better yet if you can adjust the angle individually. But which is then significantly larger and more expensive to manufacture and thus also expensive.