) You can use it on both flipboards

This model is particularly strong and can be used on magnetic glass

You get the most optimal strength when the pull is in the same direction as the magnet's field - i

Manufacturer: 3M™

recessed screw head aligns with the surface of the magnet

Ferrit magnet, Skive 40x10 mm. julepynt ) You can use itFerrite magnets Raw magnets Diameter: 40 mm Height: 10 mm Strength: approx. 2,400 gr. Large ferrite disc magnet. Ferrite magnets withstand temperatures of up to 250C and down to 40C and are therefore for both indoor and outdoor use. Magnets should always be kept away from small children due to the risk of suffocation. Ferrite magnets are a bit fragile as they don't have a protective coating. Avoid bumps and knocks. Only work with magnets using tools