One magnetic surface of these square neodymium block magnets is attached with 3M adhesive. For ease of use, all rectangular (square) neodymium block magnets with adhesive have protective backing strips. You can use square adhesive magnets on almost any non-metallic surface. Adhesive backed neodymium (NdFeB) block (rectangular, square) magnets are optimal solution for many DIY projects. Small sized ones are widely used in package. Popular Sizes Of Adhesive Block Magnets Adhesive Block Magnet 10x5x1mm 3M self-adhesive backed neodymium block magnets 10x5x1mm 10x5x1mm neodymium block magnets with adhesive backing
