Each powerful magnetic assembly has a durable nickel-plated cup with mounting hole. Add a hook or knob to hold lights, tools, plants and more to steel surfaces. * * More About Ceramic Magnets: Our hard ceramic ferrite magnets are composed of iron oxide and barium or strontium carbonate. Ceramic magnets exhibit relatively good holding strength for their price, making them a popular choice for many consumer, commercial and technical applications. * * Ceramic magnets have so many practical uses including; craft projects, refrigerator magnets, badge holders, latches, display boards, loudspeakers, security systems, motors, generators & alternators, lifting magnets, brakes, clamps, switches & relays, sweeper magnets, science projects, toys, games, motors, magnetic couplings, POP displays, advertising giveaways, promotional items, novelties & much more. • Made with powerful ceramic (Ferrite) • Magnet Grade of 5 • Economically priced while offering a lot of magnetic strength • Durable, corrosion resistent, nickel-plated cup w/ mounting hole • Excellent in high temperatures, up to 400 F • Magnetism oriented through round thickness / length
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