Precast concrete magnets are a helpful and high-tech means of attaching formwork to the casting bed. They are made of rare earth materials, which have higher pull off strengths than other magnet materials. The magnets are built with the magnetic component coated with steel to distribute the magnetic flux and therefore enhance the contact area. Housings are then utilized to shield the magnet from damage, or the steel can be used to bolt a housing to the magnet. When utilizing the magnet, make sure the base is clean and clear of debris.