Some Sonos dealers do not seem to know about this product. Others cannot get hold of it. Most told me that 2 well placed screws in the wall was all I needed to hang the Playbar properly. I disagree. This may look like a plain piece of metal but it is very well machined, has a flexible backing that seems to mould to the wall and help deaden vibration and it even comes with a spirit level to help with installation. It offers a perfectly secure fit and I cannot recommend it highly enough for anyone wanting to mount their Playbar to a solid wall, as I have.