Neodymium bar magnets are coated with three layers of ni+cu+ni, so they provides a shiny and rust resistant protection for rectangle magnets. Strong magnets are sturdy and reliable, when you separate the strip magnets, be careful and slide gently. Heavy duty super magnets & absolutely magnets highest grade (N52) available. We manufacture these super strong disc magnets to help you when you need a super powerful magnet.. Whether you need these powerful disc magnets to hang a tool in magnets garage keep knives safe & secure or even keep magnets plastic sheeting on your greenhouse these magnet discs get magnets job done. magnets round neodymium disc magnets. Our strong thin disc magnets are small in size but oh so powerful & are plated in a nickel-copper-nickel coating for a shiny corrosion-resistant finish. magnets pull force of this magnet is 80kg. This is a great item for use in your personal projects as well as for crafts and closures and can also be used to help keep objects secured or fastened to any ferrous surface. magnets north and south poles are on magnets flat face (red marked north). Yup, holding stuff to other stuff is what these rare earth magnet discs do best. These industrial strength magnets come with Teflon separators to both protect your disc magnets and make separating them easy.