Really useful!!
The other day I was trying to clean up an awkward piece of jewellery, and thought, "I know what would do the trick! Now where did I put that pack of Sanding Needles?" Of course, I couldn't find them (though they're in the workshop somewhere....), so I ordered more. And aren't they a delight? Just what I needed; and the added surprise waiting for me when I do finally find that lost pack!!