The strength of the magnet is designed to stay closed when both ends are joined

Separate the 2 parts from each other (magnet and steel)

Not recommended for glass boards - too strong and can easily break the glass if handled carelessly

so they will do something extra on a boring whiteboard

som forlænger deres holdbarhed og gør dem mere modstandsdygtige mod rust

UNI Chalk Marker, Sort (1,8 - 2,5 mm.) knivskinne The strength of the magnetBlack Chalk Marker from UNI for smooth surfaces like glass. Model: Black Chalk Marker Medium Line, Uni PWE 5M. A chalk marker is "fluid chalk". You need to rub it off with a wet cloth to remove your text or drawing from the window, glass board or chalk board again. But this is an advantage to this product as this makes sure that the writing doesn't come off easily in wet weather etc. Even when wet, you still need to rub it off. Color: Black. Contains: