This magnetic sheet is made from the magnetic material par excellence: crude steel directly from the rolling mill, 2 mm thick. Once you appreciate the charm of the material you will have an artistic hanging in your office or flat. At first sight it is impressive, but always worth a second look as the surface reacts to changes in humidity, temperature and light, shimmering from grey and green to blue. It can be brightened up with a little polish and rust is not a problem except in humid environments. Board and trim are fixed to the wall by means of adjustable screws and hexagonal nuts (see photo). Both steel and brass cap nuts are provided.