The magnetic box are made of super strong neodymium magnetic systme inside of the steel case. It can be activated by simply pressing down the button by the hand or foot. To deactivate them, the magnets are easily release by steel lever (to pull the button on). In the inactive position, the shuttering magnets can be easily removed from the table form. The precast concrete magnets could be used alone or connected with adpator to fix the formwork.