These Indoor Locking Dry Erase Boards provide confidence that messages will not be tampered with. Boards are available with two substrates- choose from white dry erase or black dry erase, both with a magnetic surface. Frames are available in traditional style, radius edged style or radius edges with radius corners. Magnetic porcelain on steel boards can easily be turned into locking directories. White Porcelain on Steel boards work with both dry erase and wet erase markers, or can be used with magnetic strips to create a directory. Black Porcelain on Steel boards work with wet erase markers, chalk markers or magnetic strips.