These magnetic pushpins are used by companies, schools, universities, governments, military, organizations and restaurants etc. on the magnetic whiteboards or other magnetic surfaces to hold notes, maps and signs. The colors can be chosen in a theme to indicate the progress of a project or working schedules. They are also the major materials for the pushpin arts by various artists. CMS Magnetics magnetic pushpins are the strongest ones available on the market and each piece can hold up to 16 pages of 20 lb papers onto a metal cabinet.