Flexible magnets are much cheaper than other types of magnetic material; they offer a unique combination of properties (Flexibility and Magnetism) at a much lower cost than you find in other magnetic materials.
Being flexible allows design innovation because of the inability and flexibility of the product. They also allow manufacturing techniques that are not possible with brittle or jagged materials.
These magnetic strips and sheets can be punched, bent, rolled, twisted and in other ways processed into almost every shape that can be imagined without losing magnetic energy.
The only downside to this is that the magnetic properties are not as strong as other magnetic materials, but in some cases, these are the preferred characteristics.
Calendering is a method of producing materials in sheet form; it is capable of producing sheets up to about 24 "wide. (This method involves squeezing the compound between a set of rollers, this compresses the compound and flattens it into the sheet.
To achieve the desired thickness the sheet is placed between the rollers several times until the correct thickness is reached).
Extrusion is a method used to produce materials in strips; it is able to produce strips between ¼ "to 10" wide. (This method involves squeezing the compound that has been heated through a pre-formed mold. Because the material is present, the mold is cooled and then magnetized, there are different values available at the standard level having only 1 magnetized side).