Blind threaded inserts otherwise known as nutsert or rivnuts allow you to secure anything to the walls of your van. These were used to secure my cupboards and kitchen unit onto internal columns but was also useful for adding hooks and eyes for storage. The location for the new nut is marked then drilled to size. The threaded rivet tool is then used to install the nut. It is then ready to bolt into. I mostly used M6 nuts but the tool can insert most sizes.