Sack made in robust “cordura” fabric is a useful accessory for the CL10 and CL11 cover lifters that prevents that during transport or stocking the magnetic plate get accidentally stuck to ferrous objects or to shelves or walls of vans making them difficult to separate or that could even get damaged when detached, in particular the sack eliminates accidental contacts to electronic devices that could be irreparably damaged. The high attraction force of the plate is annulled by an internal rigid panel that shuts off the magnets and render neutral and normally manageable the cover lifters.