You really get what you pay for

To make it short:
The holder itself is Low to plastic and hakelig but functional
The pocket is for the filter actually ok and helpful.
The filters actually make color casts, making the more expensive too, but in my opinion, much less.
Until then, price-performance default ware everything ok. Now the Abers:

All filters have in my case running parallel scratch marks, as if they had been drawn in the manufacturing process on an edge. Pictured they do not fall on, so far.

From 77mm lenses you have in any case, vignetting of about 2-3% of the picture frame on each side at 24mm, at 82mm, you can fix this, but if you are not 1: 1 formats up to, you can leave the well.

The rings fit neither the Sigma 24-60 EX DG still a Canon 50mm and 70-200mm L lens ans. Who cut this thread, must probably have had other things in mind than to screw on a camera. they can at least so tilt the thread that they fall only at train of more than 200g so they can be when there is no wind and use. Since I have also several other filters and had I not believe in operator error, after all the others hold, too.