Precast factories produce each 'component' of a building such as walls, floors, stairs, roofs and then construction workers put these components together to have a building.
Most of our pot magnets, channel magnets —these series names are more about their shapes than applications — were well designed so that the magnetic energy which was evenly distribute.
Most of our office magnets provide great assistance especially when you want to, for instance, attach a blueprint on the white board, hang posters for an event.