Sprox® magnets are manufactured from isotropic or anisotropic magnet materials. Barium ferrite or strontium ferrite powder is compounded with thermoplastic binders to form a granulate suitable for injection molding. The granulate is then processed in customized injection molding machines using specially developed tools. This inexpensive material can be magnetized in a variety of patterns by applying magnetic fields in the injection molding machine. Subsequent magnetization is often not required. This technique is particularly cost-effective for long production runs.