The brochure for this holder on Revain stated it was to be installed 'properly' but didn't come with instructions showing how to do it right. . It's pretty simple: it works like a French board with a protrusion attached to the wall and a notch on the bracket that slides over the ledge. The projection is attached to a metal surface (like paper) on the other side with glue. I'm not a fan of metal and have no idea if the glue needs to dry first before putting the mop in the holder (e.g. team hanger). I mounted it on the wall and left it on before adding the mop. It's been 24 hours so far so good.