Master Magnets/Bunting Magnetics Co. Self-Cleaning Overband Magnets are renowned around the world as the most effective units for the continuous removal of tramp ferrous material from a product stream. This type of magnetic separator is used to protect, clean and separate materials in the quarrying industry. Most commonly used on mobile crushing machinery, overband magnets are self-cleaning, so that no manual cleaning is required and downtime for the end user is reduced to a minimum. We offer permanent and electro magnetic overband separators to work with any application.