5 piece, .75"d x.060" thick, super magnet disc with foam adhesive, north out, no glue is needed, just peel off the adhesive liner & stick, full cure 24 hours, industrial strength acrylic foam adhesive conforms to the irregularities of rigid substrates & adheres the magnet to a multitude of materials including wood, plastic, ceramic, rock, paper & much more, north pole facing out.