The magnetic pins must be combined with a metal counterpole . The set includes four metal nano gel pads for this purpose. The force ratio between the magnetic pins and the metal nano gel pads is perfectly balanced, so that the pins are fixed by the pads on the one hand, but can also be easily removed from the pads on the other. Thanks to smart nano-gel technology, the pads can be removed at any time without leaving any residue , cleaned with clean water and reused as often as you like. This gives you maximum flexibility and you can always attach your magnetic pins wherever you need them - without drilling, gluing or screwing. The combination of magnetic pin and metal nano gel pad can hold up to 5 sheets of paper of 80g/m2 each .