After moving (before stone floor) were my existing plastic glides too hard for my floor.
Affixed glides dissolved again: just to go round not (long) well ...
So now why a star less than (otherwise full) star number:
There were no screws and no drill this (as indicated) (at least in my delivery).
Not bad, did me a good drill (yes steel tube where the hole must be pure) and metric screws incl. Hob myself concerned ...
However, providing the matching Filzgleitereinsätze is wrong!
It must be that with 25mm diameter !! Non 20mm as indicated!
That was annoying because I had to find only that the 20mm does not fit, return and re-order and hope the 25mm then adjust ...
So instead of 20mm 25mm inserts as indicated and you'll be fine!