Dycem Floor Protection Black Hole

I was impressed that my package came 1 day after the order, that's quite fantastic and impressive.
Unfortunately this cheap tool, maybe not soo cheap as its 13,90 Euro, came with a bad finish, almost as if I bought a used product instead of something new.
aesthetically I would rate it less than 3 regarding quality, but as it serves its function and keeps the cello in place at home, I've kept it at 3.

I thought this was meant for the pin to stop slipping, but I don't think it is. This because it doesn't stop my cello from slipping, so this was a misspurchase.