NOT for "anyone" 1

I bought the part at a trade show. Although I had concerns about how this simple part because sharpened can a reasonable angle to the blade. The existing plastic angle helps because not - because it is rotated by 90 °. The seller has dispelled my doubts: the tool "Search" to angle his own business by carrying on the existing angle. One should not only keep the tool firmly.
Well, I have tried at home to several older knives and scissors. And no matter how little pressure I proceeded: the tool causes nicks. The blades are indeed actually sharper - but also with a lot of good to the naked eye to be recognized nicks. These knives are in any case completely devalued.
The printed manual and DVD (not really well-produced, Tacks missing) simply claim only, the tool would find automatically the right angle - but the film is not really recognize how exactly hinbekommt.
Maybe there are people who happen to bring the the right feeling, so that where the sharpener shows the right results.
But "everyone" that is not just.

I have banished from my household and am angry beyond thrown money.