It will slide a little easier on glass boards

you must multiply the need for carrying capacity by approx

It is a magnet in a "piston"

as you can easily damage your glass board by carelessly handling this magnet

The sign cannot stick to plastic parts or to cars made of aluminium

MagMount 300 (MagSwitch) engros It will slide a littleMagMount 300 is the perfect tool when working with mounting in a workshop. Just like having an extra hand in the workshop easy to use and to switch on off with the silver handle. See the data sheet below. Strength: up to 111 kg. (246 lbs.) in a direct pull. The MagMount 300 is made with a strong magnet which can be activated disabled by simply pushing the handle from one side to the other. It is not made with electro magnetism so you won't have to