Ça ne vaut pas un clou (it’s not even worth a nail)

Target concealment involves hiding an object in some kind of container or enclosure, or behind a barrier; or alternatively, disguising it to look like something less valuable than it really is. Khashayar Naimanan’s box of nails from the Hidden Wealth project shown at MOMA 2005 are a brilliant example of one way to disguise valuable gold and silver as ‘worthless’ everyday household items. Just don’t forget what they are the next time you bust out the hammer.