The assembly of these parts went with the cordless screwdriver slightly out of hand and (we already know that) do not damage even when wearing the precious wooden floor. A few years ago we used felt pads that were glued into a plastic bag and survived it. This combination was ultimately screwed also the chair leg. Unfortunately, it ended up being so that the edge of the plastic bag is punched into the ground, which drew ugly patterns on the wooden floor to be.
This article is not so, because the metal rim holding the piece of felt on the spot, is bent inward. We recommend!
