The screws have a length of 20mm, 15mm which are screwed directly into the appropriate piece of furniture - it should be pre-drilled with a fine drill. The screws may be exchanged for shorter / longer screws without problems.
After use of felt pads has done this annoying squealing. Even under a load of over 100 kg on my part to give the felt pads and not to wear the felt can not be seen by use of now more than 4 months.
The assembly proved to be very easy, even for novices. You should pre-drill with a small wood drill holes and then attach with a screwdriver, the felt pads centered under each chair leg. Due to the screw connection, the felt pads let emersion or dismantle with ease. This is a clear advantage over nailed or glued felt pads.
Get me this glider continue and mark gene Christmas for the extension of the kitchen with two other kitchen chairs reorder yet which.
Strong buy recommendation !!!