Ferrite Ring Magnet
Ferrite ring magnets, also known as ceramic ring ferrites, come in a wide range of sizes. They are often used in loudspeakers and in resonance imaging and torque drives. Other applications for this permanent magnet include holding, door closures, joinery, and lighting fixtures.
Ferrite rings are similar to ferrite disc magnets but with a hole in the middle, which makes them a versatile magnet option. One popular application is the fishing game, tied on a piece of string, or to pick up pins and needles.
Ferrite Ceramic Rings have less magnetic strength (due to the hole) but their inexpensive pricing makes them a customer favourite.