First production Room Dividers using plywood circles, were attached to each other with screws. I never really liked this idea, and wanted a better solution. MAGNETS ! found a good source with the appropriate stength, and was very happy with the results. CAUTION: found out the hard way, to never hold 2 magnets at the same time - even if they are in separate hands. Those suckers fly together and it pinches your skin, and it hurts!