The magnetic hook must be combined with a metal counterpole . The set includes a 3M metal pad for this purpose. The force ratio between the magnetic hook and the 3M metal pad is perfectly balanced, so that the hook can be fixed by the pad on the one hand, but can also be easily removed from the pad on the other. The thick metal core inside the pad makes the pulling force particularly strong. The metal pad is permanently attached using 3M adhesive tape . Please note the installation instructions on the product page. The combination of magnetic hook and 3M metal pad can support a load of up to 4 kg .