Round Handle Magnet with Knob and Ferrite Base | 57mm diameter x 35mm Rubber_Coating or on a spindle

or on a spindle

They secure the materials within and to other materials through the agency of magnetic self-adhesive strips

while a new magnet secures the next course material in pride of place for further encumbrance with phrases or symbols

like these 11mmx30 neodymium cylinders

Round Handle Magnet with Knob and Ferrite Base | 57mm diameter x 35mm Rubber_Coating or on a spindleMagnetic Product Description: Hold blueprints, calendars, important memos, visual aides, work plans and more with these convenient, heavy duty magnetic bases. Ideal for warehouse, workroom and office use. Each magnet features durable nickel plating and easy grip knob for positioning. Watch Round Base Magnet with Knob Video Uses for Round Base Magnets with Knob: Hold blueprints, calendars, important memos, visual aides, work plans and more with these