· 【Powerful Permanent Magnets】: Neodymium is a kind of rare earth metal, it's suitable for making permanent & powerful magnets. This magnet has permanent magnetism, it will be the same powerful even decades after.Constructed of a super strong neodymium block magnet embedded in a steel channel. Magnet is recessed inside the steel channel for protection and added holding power.A small magnet can provide 80 pounds of pulling force. You deserve it.· 【Umerous Applications】: Useful neodymium bar magnets for holding, mounting, home improvement, diy projects, and many more. Great as a cabinet or shower door catcher.· 【Best Coating Available】: Strong neodymium rectangular pot magnets are coated with three protective layer of Black Epoxy+Cu+Ni on the surface. The perfect coating available, which provides a shiny and rust resistant protection for strong rectangular pot magnets.· 【Easy Installation】: Countersunk holes designed for #3 sized screw for easy installation. Steel channel protects the rare earth magnet from damage, allowing it to last longer than a standard magnet.· 【Quality Guaranteed】: Made under iso 9001 quality systems. The highest quality available! We are a magnet supplier with professional strength. If you need mass customization of magnets, contact us.