> alice, weigh toolbox You can't. A toolbox will weigh ~10 kg and the smaller parts in it (like Alen wrenches) will be well under 2 grams. You want 1:10000 scale precision. I don't think that this is an option for low cost places. The high cost places already have arrangements for this. But who knows ? Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.