Metal punching is a process of making hole in the metal work-piece during metal fabrication. A scrap slug is generated each time a punch enters the punching die. The punching and plate scrap is comprised of foundry grade material that is derived from the punching, which can be recycled and reused by utilizing suitable recycling technology. A reliable cutting unit with long service life is required to economically shred this type of metal scrap. Factor Scrap has proven itself well in the efficient recycling of metal punching scrap.